- regarding gaming perf on Linux+NV, you may find this thread informative: DirectX12 performance is terrible on Linux
The good news is that the upcoming driver is supposed to fix it. - regarding Wayland issues, Wayland itself is known to be unstable and on top of this combination Wayland+Nvidia is basically asking for trouble. This is a multilayered problem, NV drivers is just one of the factors.
- generally speaking, due to driver issues IMHO NV cards on Linux should not be considered as display devices at all, only as accelerators.
Answering your question “When will full GPU performance be utilized as good as Windows for all software by default”: probably when desktop Linux reaches ~30% market share, things will start to improve slowly from then on.