I shoot a lot of motorsports events, sell the photos to car owners to finance travel. Its a break even hobby. For this I use an EM-1 and a 40-150PRO. I take a PL-7 and a 12-40PRO for a backup body, photos in the pits and paddock, and the 17 f/1.8 which I never seem to need. F/2.8 is marginal indoors sometimes, but I get by with it, rather have a zoom on the body when it can work for me.
Most of what I see at the track is Canon with some Nikon, a rare SONY or Panasonic. I have never seen another OLY kit there besides my own. I am referring to credentialed photographers like myself. I pay no attention to what spectators carry. I'm on the track side of the fence and K-wall.
I recently flew across America and drove back. I wanted to travel light so I took my travel kit, the PL-7 and the 14-150. I brought the Bower fisheye which I used once, and the 14-42 which I used often. I brought the 17 f/1.8 and never used it. The only compromise I make with this kit is low light. Most of the time it isn't a problem. In the worst light I had, I shot f/8 1/250. Not a problem for consumer grade lenses. There are enough good light opportunities to document travel. I sacrificed a little sharpness, but I was not out there for photography. I went to bring to a car back rather than ship it. I was on the road for two weeks, happy to take a small bag.
I didn't see any dedicated cameras on this trip except my own. I visited friends who used cell phone cameras and produced inferior photos to the M43 gear I brought in any light especially at night. Even in good light, you can easily tell the cell phone images from the M43 images. They were good cell phone cameras including the iPhone X whatever the correct name is, the $1,000 cell phone. They looked at the images on their 65" 4K TV and frowned when they saw the difference, but I doubt they will go back to using a dedicated camera. It isn't as much fun, or as easy, and better photography isn't important enough to them as long as they don't have to compare images with something better. What they get from cell phones is good enough for them.
I stopped in Northern Nevada to photograph bighorn sheep feeding at the side of the road, wandered down to a lake, and took one photo of the car with the desert mountains in the background just to prove I was there. Didn't think much of it. Light wasn't very good, overcast sky. Just a random shot on "P" with the PL-7 and the 14-150. Camera chose f/8 1/250. I printed it cropped 75% on a Canon 13X19 color printer. Surprise. Photo is stunning. Everything in focus, the car 50 feet away, the mountain 25 miles away. Lots of detail. I think it could be printed a size bigger. Typical comment is "It looks like a car advertisement or a photo from a brochure." Good enough for me. The PL-7 and the 14-150 cost me $650. Not bad at the time considering the range of the lens. A one lens solution most of the time.
Went to the local camera store to buy an ink tank. Took the photo to show a friend I met there. Threw the photo on a counter and it gathered a crowd. Everybody liked it. Nobody asked what camera made it.
Showing a friend an EM-1MX and an EM-1 MKII kit for sale for $1600 bundled with the 12-40, I got into a conversation with a sales clerk. "16MP isn't enough", he said. "I wouldn't shoot with that. Never liked that PL-7. Oh, great photo."
"Made it with a PL-7. Photo is cropped 75%, JPEG is a 1.5MB file."
Clerk wandered off. Probably thought he lost any chance of selling me anything. He didn't. I buy what works for me, don't care what other people use or think. I was amused, not offended.
People get all jacked up about the specs of their gear. It isn't as important as being at the right place at the right time. If the framing, composition and post processing are good a little compromise on IQ isn't as important to me as going light. I have prints hanging on my wall made more than 10 years ago with a Canon 8MP DSLR. They look great.
Panasonic has very aggressively priced kits now, two lens kits in the store for $399. If I needed one I'd probably go that way. I shot Panasonic before OLY introduced OMD, had good luck with the Panasonics though the lenses were not as good as they are now.
Entry level ASP-C DSLRs make good images too, but I shoot a lot of telephoto so they are much bigger and heavier, not for me. I would not have taken a 70-200 Canon or Nikon on this trip. Without that, no sheep photos so no car photo because I wouldn't have stopped to photograph the sheep. The M43 compromise is just right for what I do.
At the track I think size matters. Bigger that is. Sometimes the light is too low for f/5.6-6.7 lenses to bring out all the detail. When I'm trying to sell them, I need detailed photos in low light. I think a professional looking kit makes it easy for customers to think I'm a professional. In the end they look at an internet resolution image to decide if they want to buy a print, but first I have to get them to look. With a cell phone camera they wouldn't and shouldn't. A cell phone can not take good photos at the track.
I don't expect the world to change much. I'm a little guy myself, 5'7" 135 lbs. I can't travel with or carry quality DSLR FF or ASP-C lenses in comfort. I'll still be a dwarf out there at the track with the rest of the credentialed photographers with their big C&N kits. I don't mind. That amuses me too. I only care about the photos and they are very good.