Anyone remember the Indrema that was Linux based? It had some of the same problems.
I don't see why this argument is reasonable. Windows is currently costing you about $100. Linux is currently costing you exactly $0. Linux has come so far, I doubt there is any area where it doesn't make you at least 80% satisfied. So the choice would save you about $80 of value, two triple A games in a Steam sale.
And I don't know what your choice of games are, but while there may be really 90% of steam product listings without Windows support most people also wouldn't buy/play about 90% of the products. If you look at the interesting games the feeling is more like 80% of what we need is there as well. And the rest will certainly follow once the user demand for Linux is there.
So, please continue to think what the real reason for not switching is. The providers would certainly follow. Most already have a Linux deployment pipeline ready and just wait for users to ask for it.
Some popular games like Civilization VI have been ported to Linux but they run better on Windows and faster for some reason. I suspect the Windows drivers are better optimized. I triple boot Linux Mint, Windows 7 Pro, and Windows 10 Pro. Linux Mint seems to play the Civ 6 game slower than 10 or 7.
A small company cannot possibly launch a brand new platform the same way consoles launch.
It's just, their corporate culture makes them very conservative about spending money. SpaceX they ain't.