A funny detail is that Microsoft's mostly fruitless ARM efforts unintentionally ended up being a boon for Valves ARM effort. From MSVC 2019 they started augmenting x86 binaries with undocumented metadata specifically to assist the Windows x86-on-ARM emulator, but then the FEX team figured out how that works and implemented the same optimizations in their emulator, greatly increasing the performance of most recent Windows games on ARM Linux.