Now you are assuming I have opinions I don't have.
Take EOS M for example. Right from the start I saw the missing "forward compatibility" with any future full frame mount, and warned friends about investing in the system. It was to me obviously a temporary system to get some experience with mirrorless until Canon, Canon's users and the technology was ready to do the jump on there main (and professional) system.
I also don't believe - as many others do - that Canon and Nikon didn't believe in mirrorless until "Sony proved them wrong". Sony was in a completely differen't situation than Canon and Nikon. Sony went for the first-movers. People who were ready to buy new technology because they knew it was the road of the future, even if it not nescesarely was better cameras in practice yet. At least not in every way. Mirrorless offered some advantages, but also some disadvantages. But Sony could move first because the didn't have same big group of professional users who would be unhappy - probably very angry actually - to be "forced" to leave existing system (no support/development on old system) to change to a system that wasn't mature and with technology offering more advanteges than disadvantages for most users. Canon or Nikon had to mature their technology and prepare their move very thoroughly. And yes, when Canon introduced the EOS R body, it was probably not the camera they had dreamt of. But I'm sure the knew the technology they soon would have ready, and which became cameras like R6 and R5.
Personally I also never had doubt mirrorlress was they way forward. And if I was new to photography, mirrorless would have been the only right thing to invest in a couple of years before I actually made the move myself. Beecause it would be stupid to build up a new DSLR system. But it wasn't until R5/R6 and there advanced animal eye AF that I saw the advantages of mirrorless becoming big enough that it started to be interesting to make the move from an existing DSLR system. And it wasn't until Canon released the APS-C R7 body, that they also made the camera I wanted. I was lucky it was Canon, so I could keep my existing lenses. I guess it could easily had been a Sony or Nikon camera instead at that point. But I never regret waiting to make the move, I saw no advantages in doing it before.
So don't pretend to say I'm a stuborn conservative photographer who don't want new technology. I love the technology developments. I'm a tech nerd following all the developments. But I'm also a photographer that just want the equipment that serves me best. And of course electronic shutters is the future. And I'm not saying that I don't want mechanical shutters to disappear. I just say I don't believe it happens so quick as you think. At least not for all. If Canon put a very fast stacked sensor in an R7 II, I might be one who soon solely use electronic shutter. But not every camera will be like that tomorrow.