Does the difference in alt-tab behavior between Windows and MacOS (with alt-` too) slow you down at all? I might venture to guess no, since your workflow sounds like largely single-window-per-program.
The worst part for me about switching back and forth between MacOS and Windows/Nix is the muscle memory around applekey+c/v vs ctrl+c/v. There isn't a way to remap keys to recreate that muscle memory on Windows/nix and keep the muscle memory for alt tab.