I visited WoW UI every day. I’d visit even if I wasn’t going to log on. Just to make sure my addons were up to date, and see what might be new.
Apparently, as of yesterday, Trion has released the start of API documentation, and a couple sample addons.
Granted, addons didn’t help Warhammer.
But the wife and I have enjoyed Rift a lot more than we enjoyed Warhammer. The addition of addons can only help a solid game.
And so we’ve got Rift UI.