I think it played a part in ending Olympus's camera making days :-( . Every single user of m43 has at some time mentioned size and weight being a major factor . It was only ever going to appeal to a small niche within m43 users. As I say if the camera works for your use case at the current used price well worth nabbing one.
I still use the E-M1X to this day, even though I also shoot with a Z8 FF. It is a body that I use for extended shooting and I need to travel light and sit in Economy. And no, I do not fly First Class or Business Class like many wildlife photographers who fly around the world attending expensive wildlife workshops with paid award winning photographers.
But it was truly a niche camera at the time of launch, but was a revolutionary camera for its time with probably the world's first AI subjection detection, before subject detection was even considered a necessity. Today, it is a necessity, but back then, you are paying close to $3000 for its AI AF and HHHR (Handheld Hi-Res) plus the dual battery and the built-in grip, which I still considered today to be the most comfortable grip. The Nikon Z8 hurt my hand after 6hrs of shooting during my recent wildlife trip.
For a 1st Gen AI AF, it still works, but is no match against the OM-1 nor my Z8.
I do know that Olympus sold a lot of E-M1X, which is why you are seeing a lot of them today at dirt cheap prices. But for a time, it was a pretty decent price for wildlife photographers who could afford them.
But I think people do not know that the true audience for the E-M1X was bird and wildlife photographers. People who will use it with the 300mm IS Pro and the 150-400 Pro. With these 2 lenses, the 1X is an awesome combo and for the price then, it was not a bad price.
On my recent wildlife trip, I met a group of wildlife photographers who paid award winning photographers to go on such. Do you know how much they paid for those trips? Roughly $10,000 incld accommodation and on my Alaska trip last year, a few paid up to $30,000!! So what is $3000 for the E-M1X or now the Z8 or R5 mark II, when they can easily afford a $30,000 trip. That doesn't include airfare. And they fly, not coach or economy, but First Class or Business Class so they can bring in their 600mm f/4 or 400mm f/2.8 lenses in cabin. On the recent trip, many use the Canon R1 and R5, Nikon Z8 and Z9 and Sony A1 and A9 and I think one OM-1 Mark II with the 150-400 Pro.
So, no. The E-M1X didn't bring Olympus into bankruptcy, but some needed revenue. It was the full frame sensor and people with no money no object that decided that if I can afford a Canon R1 or R5 or Z9, I will buy 2 and have 1 with a 600mm f/4 and another with a 400mm f/2.8, because they can easily afford them.
The E-M1X came at the time where there were no viable mirrorless options, but today became obscure, because it had lost the sensor size race. Fuji at least still have the mystic of their color science and their X100 series cameras.