I usually do as well but I've found a few things I've wanted to use that weren't available or supported on 16.04. I've also had the issue of using a none LTS build and forgetting the lifespan is now very short.
My server is still running 14.04 LTS. I'll probably consider upgrading that to 18.04 after the first point update.
EDITED: 18 Mar 2018 17:33 by ANT_THOMAS