If someone comes to me I'm more than happy to answer questions and help, but I won't bring it up. People don't like being told that their tool of choice is "bad" "not optimal" or anything like that. Even if it's only their choice because they grew up with it or don't want to learn anything new. And they still need to learn if it's more than browsing the web.
Also I really don't want to be the one they come running to once something doesn't work the way they expected - or not at all. I don't have the time nor the inclination to be tech support for my family and half of my friends.
Nouveau is stable and runs, but don't expect the best performance. The official NVIDIA driver is unstable, lacks proper wayland support but has decent performance. I'd go with anything but a NVIDIA GPU.