"Anglosphere" would be just 7(&"8") bit ASCII, and it's the current situation where it takes quite a lot of skill and knowledge just to start learning how to properly deal with Unicode, because it's often not even taught !
IMHO 32-bit bytes would help tremendously with onboarding developers into Unicode, because it would force dumping ASCII-only as the starting point (and sadly, often ending point) for teaching how to deal with text.
And who can blame the teachers, Unicode is already hard enough without even having to deal with the difficulties coming from having to explain its multi-byte representation...
Last but not least : this would have forced standardization between the Unix world now on UTF-8 and the Windows world which is still stuck on UTF-16 (and Windows-1252 ?!?) for some of the core functions like filenames, which, for instance, still regularly results in issues working with files with non-ASCII filenames.