I’m just wondering; if Blender gets changeable keyboard map, would it be copyright infringement to include the same keyboard layouts for commercial products to ease migration for those coming from other software?
no it wouldn’t
Yeah, I don’t really see how you could copywright a keyboard layout 
That’s not true!
I own ctrl-C & ctrl-V. And software companies need to pay me royalties when they use it as copy-paste. That’s why blender does not use it.