All the negative feedback here was already factored into the product design by Canon's marketing department. It seems only four options are available:
1) you'll buy the 90D anyway
2) be forced into buying the R or 5DIV to get your 24p frame rate
3) you'll sit out this product and wait for the next Canon iteration
4) you'll sell all your canon equipment & jump ship to sony/nikon/fuji
5) You'll add a Sony or Fuji for video. But even with an adapter that likely means some of your future dollars will go to their lenses and not Canon's.
I have a friend who shot for years with Nikon pro equipment. He picked up a Fuji XPro 2 for something small and lightweight, and he doesn't even talk about Nikon's new products any more. All of his money has gone to Fuji since buying that camera. I think handling with long teles is the only reason he hasn't sold off his Nikon gear to fill out his Fuji lens kit.
Now in Nikon's case they just didn't have a mirrorless to offer him when he wanted one. And that's a huge task (design, tooling, manufacturing). But why risk introducing your customers to the competition over a
firmware change???
I'm still waiting to see what the 90D/M62 video quality is like, but it looks like I'm going to add an X-T3 this year simply for video. I would much rather add a Canon for the lens compatibility and shared ergonomics. In my case I can't see myself abandoning Canon for stills because I'm in love with 5Ds IQ. The 5Ds gives me what I lusted for back when I was shooting xxD bodies and the 7D, but wanting files from MFDBs. Even so, if I pull the trigger on an X-T3 it means some of my future lens purchases will be for that mount rather than Canon's.
It seems quite silly from where I'm sitting.
The statistical analysis they ran to maximize profit...
Let's not worship market analytics. When someone screams that Canon is bleeding customers or that Canon management is full of idiots it's fair to point out that Canon's marketshare is growing. But not every marketing decision is ideal, nor immune from criticism, even from the perspective of profit.
Get the most you can for your Canon gear and move to Sony, which throws a kitchen sink of features with every product they release.
Ironically, on other forums a lot of people are complaining about their two releases, the A6100 and A6600.