Shame on Google and Apple, it was always clear this was the end goal and next up is also your PC.
Right after will come the removal off apps they don't like and there is nothing you can do about it.
Stallman was right
Already starting on macos. Gatekeeper had setting where you could allow any app. Now it is removed. While still possible to allow individual app (you need to do it after every OS update), trajectory is now clear.