Worse than just not supporting gaming, they're antagonistically blocking companies like Nvidia who tried to fill in the gap with external GPUs.
https://appleinsider.com/articles/19/01/18/apples-management...
If you want to game, you buy Windows, end of story.
They just announced PS4 and Xbox One gamepad support and had Mojang on stage to demo a new version of Minecraft in this very keynote.
Question is why people keep wanting MacOS to be a hardcore gaming platform.
I don't think any of those games are GPU intensive. Blizzard seems to want their games to run on as many machines as possible, and Rimworld and Factorio are both 2D.
I wouldn't recommend it for gaming as it doesn't shed heat fast enough. You can build a separate really good gaming PC for ~$1000 and still be far off from even the iMac Pro.
It's like the previous generation of Apple computers were primarily designed for people in crowded metros like Tokyo. I still don't understand Apple designers' obsession with compactness for their desktops at the cost of everything else.