Ho-oh left gyms yesterday and Johto ends today so pretty close!
Ho-oh didn't leave but Regirock returned for some Legendary raids. Ho-oh was officially supposed to be available until the 27th according to the in-app news. Weird.
I also hadn't played in forever (Since 2016 at least) and now I'm addicted again.
Same!! I quit in Mar 2017, was roped in by mom after trading was implemented...and proceeded to get hooked again lol.