I'd argue it's probably time to drop 32-bit x86 support, but the rest of this stuff is arbitrary and doesn't have any tangible benefit except conveniently providing hardware manufacturers with an excuse to unload new hardware onto people when there's nothing wrong with what they have. (not to mention, pardon the conspiracy theory, they're probably trying to use the TPM to turn the PC into a smartphone-like platform)
It's surprising that when we had Win7 they did that brief "XP Mode" experiment with some virtualized-penalty box.
Why didn't that go further? Presumably virtually any x86-64 box currently in circulation would be fast enough to run a VM running a full copy of 32-bit XP/Win7/Win10, or even a full carousel (or download store) of DOS and early-windows releases. It could be the most compatible Windows ever, solving the weird "64-bit systems can't run some 16-bit apps" gotcha and perhaps allowing some way to bridge in support for devices that can only be driven by old 32-bit XP drivers.
