See my comment below. Since Meta Stack Exchange was separated from Meta Stack Overflow in 2014, it
no longer never makes sense to expand
[metaso] to Meta Stack Exchange.
Also there's currently no magic link for MSO (
[so.meta] do not exist), so it'd be convenient and reasonable to redirect
[metaso] to MSO, and alternatively make
[mso] work. Adding magic link for Meta Stack Overflow?