Any examples? I've run 32 bit proprietary wireless carrier network hardware configuration tools from 32 bit windows XP on it?
Drivers for hardware, games and apps will only work if they’re designed for a Windows 10 ARM-based PC.
64-bit (x64) apps won’t work. You’ll need 64-bit (ARM64) apps, 32-bit (ARM32) apps, or 32-bit (x86) apps.
Certain games won’t work. Games and apps won’t work if they use a version of OpenGL greater than 1.1.
Apps that customize the Windows experience might have problems. This includes some input method editors (IMEs), assistive technologies, and cloud storage apps.
Some third-party antivirus software can’t be installed.
Windows Fax and Scan isn’t available, nor are Windows RSAT (Remote Server Admon Tools).
I myself couldn't run PGA Tour 23k on ARM (works fine on Parallels on an Intel Mac), so I can confirm #3 above. Granted, most apps for most people will run OK on ARM, but there are some limitations.