[benjaminl]

Windows on ARM supports 64bit ARM apps.

What you were possibly remembering was that Windows on ARM when it was first introduced only supported emulating x86 apps. Although x64 emulation is currently in preview.

https://docs.microsoft.com/en-us/windows/uwp/porting/apps-on...

[GeekyBear]

Legacy x86-64 app emulation has only just appeared in alpha form and still has massive compatibility issues.

I'd still call it something we hope to see in the future, instead of a working proof of concept.

https://www.youtube.com/watch?v=OhESSZIXvCA