I'm glad the AMD GPU option still exists, I don't have great experience with NVIDIA on Linux. The rest of the upgrades, like the new top cover and keyboard, are very welcome
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The only issues you may run into if you distro doesn't include the firmware. e.g. This was the case with Debian 11 and you had to enable the non-free repo.
The only other problem you can conceivably have is card isn't supported by the kernel because it is too new. This can be fixed by upgrading the kernel. In Debian you can use a backports kernel, I am sure there are similar options in other distros.
When I was using my old 1080Ti, I had constant issues with the NVIDIA drivers. Acceleration didn't work on the second screen sometimes. There was some magic setting that would unset itself.