As others have said, phones are increasingly the way to go when you're looking for 'zero mass penalty' ad hoc photography.
The simple truth is that even if I'm not planning to take a picture, if I'm going out for the day I will inevitably have either the M10+elmarit/cron, Q or one of the MFT bodies with a pancake with me anyway. Unless it's actually the size of a phone, you're not really carrying (well at least I'm not, it'll ruin the lines of my pants or jackets) even an RX100 in your pocket anyway.
I've always had the RX100 since it was released in my bag as a backup, and also as a primary carry when I don't want to walk around with anything else. But in the last year or so, I've noticed that I hand the RX100 (which I still carry around everywhere) to others - because they might have an ancient phone - instead of using it myself most of the time. It's really got to the stage (since I never use it for video now) where I could be carrying the MkI instead of the V and it probably won't hamper *my* current uses for it at all.
That's causing me to look to re-upgrade the one-box compact to something that's not 100% portability focused but something that's actually more usable and potent, i.e. something that's not an adjunct but could be used by most as a main camera, but still easy enough to slip into a bag and occupy a space not that much bigger than the RX. The more I look at it, the more the G1XIII is looking like a contender... but it's not *quite* there. I will probably have to check it out though.
Over the past few years, I've been trying to hone down what my ideal set-up of cameras might be.
When I think about it, there are 2 restricting criteria I come up against that really restrict the cameras I look at for vacation / family excursions.
My 1st restrictive criteria is that I really do want a camera I can stick in my jeans pocket. My family and I go to amusement parks, and my daughters are getting older so we are going on the faster rides. On the faster rides, you are not allowed to have any carry-ons! So if I had a camera that I couldn't stick in my pocket, I'd have to leave it in the "bin" at the loading area of the rollercoaster. (I'm not really in the mood to do that.)
So any camera that doesn't actually fit in my jeans pocket, is out as an all around vacation camera for me.

Even my Pentax Q, which is a really small mirrorless, gets left behind on days that we go to amusement parks, where as my Canon S90 (before I dropped it one too many times) or my Fujifilm XP80 waterproof camera fit the bill.
And I guess, the other criteria is that I really appreciate a waterproof camera, because we go camping, to the beach and water parks. So . . . I can have the most amazing camera, but if I'm unwilling to take it somewhere because I'm afraid of it getting wet, then what good is the camera to me. LOL.
So I have been personally finding that I seem to buy really big cameras, (because they get the job done when I need to make sure I get the shot) and really small cameras (ones that can fit in my pocket) so I don't have to leave my camera behind on vacation.
I guess, for times I can walk around and not have to worry about getting the camera to fit in my pocket, I just grab my Pentax Q, Pentax ist DS or Nikon D5100.
But out of all the different types of cameras I have been researching . . . it has been the hardest to find a really nice compact "pocketable" camera that doesn't cost an arm and a leg! LOL.
Big capable cameras! Besides being expensive, are easy to research and find.
Medium size cameras that don't fit in my pocket, lots and lots of nice cameras to choose from! LOL.
But small pocketable cameras that pack a big punch . . . it's the most research I have done to get a camera! LOL.