I would say Linux was more ready for mainstream use 10 years ago. Now with Wayland and (god forbid) Nvidia is quite unstable. And if the best advice is “do not buy Nvidia”, then indeed it isn’t ready for the mainstream use.

On 3060 mobile, there is flickering in steam and chrome, but it’s usable. In chrome I believe it can be fixed by disabling hardware acceleration.

Sure, I agree, but Nvidia proprietary driver is still the best for gaming, isn’t it?