You can actually do i think 11-12 letters today, so you could do:

insurance•nostr

and things like that already.  rules allows a "spacer" character, which is like a dot.

Gonna come down to what the future clients support.  But it ought to be the first fair system that is going.  There may be some grift and token sales involved, knowing some folks around, which would lead to competing names, which is bad for nostr.  However, often how the politics plays out.