By some definition. They have always been usable to some degree because I think animators or something use Linux commercially on Nvidia, and for gpgpu they are still top class on linux (nothing comes close)
They haven’t always been the best for gaming or desktop (Wayland) use though, since Intel and AMD opened up their drivers.
Arguably in my experience Nvidia has been far less buggy for the last 30+ years on x11, and with this change they may have finally reached parity on Wayland, haven’t tried it myself.