It’s really not that bad. I used Nvidia for something like 10 years on Linux and only recently switched to AMD. I was able to play games just fine, and I only really had issues when I switched to rolling releases (Arch and then Tumbleweed) because sometimes the driver and kernel would get mismatched and I’d either need to rollback or reinsntall the update. I played tons of games in that time.
AMD is a better experience on Linux, but mostly for things like Wayland and driver updates. Actual day-to-day usage is fine with Nvidia, just nothing to write home about.
That said, I have zero experience with laptops, and I’ve heard that can be a royal pain. However, I don’t know if it’s better on AMD, or if graphics switching just sucks in general on Linux.