Intel mentions requiring support on their quickstart guide: https://www.intel.com/content/www/us/en/support/articles/000091128/graphics/intel-arc-dedicated-graphics-family.html

You mention in one comment that you want to use an Intel Arc. Those require resizeable BAR support on the mainboard/CPU. Search the manuals of your Mainboard/CPU. If it isn’t mentioned, then the GPU will not work

I like it. This action is inevitable in my opinion, and there will always be legacy systems regardless of the timeline, better start sooner than later.