I've defaulted to setting up v6, but deactivating it once it causes trouble. I don't want to actively sink time into it, but in 95% it just works out of the box (or with obvious config changes, like adding an IPv6 listening port and an AAAA DNS entry), and in those cases I'm happy to let it stay until it causes trouble.
In another 10 years it's probably worth putting more effort into the other cases as well, but so far I'm happy with getting 80% of the way there for 0.1% of the effort.
In another 10 years it's probably worth putting more effort into the other cases as well, but so far I'm happy with getting 80% of the way there for 0.1% of the effort.