I've never needed to. I don't think I've ever been with a non-mobile consumer ISP that rotated IPs enough for it to mayyer. Maybe if I took the modem offline for more than a week or if I move, but that's the only times I've ever had to update the necessary IP addresses.

It's still not a great fix, of course, because DDNS still causes outages while intermediate servers wait for their TTLs to expire and caches to clear, which means your record could point to the wrong IP for at least one minute per switch. That's fine for a mail server, but not great for other applications that don't handle servers dropping from the network so we'll.