ARM Windows probably already does better than future Asahi+Proton+FEX in that it includes a Rosetta2/FEX like layer of it's own, is otherwise the native Windows

ARM Windows probably already does better than future Asahi+Proton+FEX in that it includes a Rosetta2/FEX like layer of it's own, is otherwise the native Windows without needing to fake that interface, and e.g. Parallels already has DX11 working through Metal without the need for a future version of Asahi drivers combined with the layer in Proton. The downside to either approach is anticheats. Games without them can run great today, games with them can't run at all because they are kernel level x86 code and emulating the kernel architecture is too slow for games. It looks like Windows is doing another ARM push with higher end chips and less vendor exclusivity this time around - maybe that'll finally get enough market penetration to make this less of an issue going forward, at which point virtualized ARM Windows could be nearly fully viable.