By the time you’re ready to buy a new card, Nvidia might be working well under wayland. They’ve already made significant changes in the past couple of years, like implementing GBM and hardware accelerated XWayland. To my understanding, this MR will also fix some remaining issues in the future. I don’t know how much more work needs to be done after that, but just the fact they are cooperating with the free software ecosystem is a good sign.
Perhaps more importantly, the free nouveau driver can now experimentally reclock nvidia gpus from the 2000 series and newer. With this breakthrough it is possible that nouveau + nvk will be able to compete with the proprietary driver in the near future. If/when we have a well-supported free driver, we will probably have proper wayland support as well.
I’m not really in a hurry to switch to Nvidia. I’ve been quite happy with my AMD cards so far. But it’s definitely a good thing to have the option to buy from any vendor.