Another Tumblr Refugee
I too am a tumblr refugee though not new here. Gay guy in Florida here. I have found a home on a site called Mastodon, which has several adult blog platforms depending on what you're into. I have opened a blog called ParkBenchCruiser on the Humblr platform, have 1700 posts and already over 1000 followers - so far its a fun community. It's the closest thing to Tumblr that i have found.
I am a tumblr refugee too, though I have been on this site for years also. The closest thing I have found to tumblr so far in my own travels, is bdsmlr. Looks and works almost like tumblr. In some cases better, and the parts that arent as good they are hard at work on. And despite the name, not only for kinky bdsm stuff, though you certainly of course will find that kind of content there. But there are strictly nudist blogs and all sorts of things there too.
The thing I like most though is the active development on it. The developers communicate almost daily, (even on New Years Day!) as to what they are working on. Quite a departure from tumblr which didnt seem to be worked on at all, let alone communicate about it.