I’ve been in countries with no tipping. (Australia, NZ) and what happens is ANY server will respond to your request for refills, extra setups etc. You technically have “your server” but you can flag down any server if you need something like extra condiments, or the check.
You no longer have to sit and stew and wait while watching servers take care of “their” tables while you wait for “your” server to come back to get you extra napkins or something.
Kind of liked it. Just sayin’