Tumblr is focused more on microblogging, so there are longer form posts, fandoms, and artists. I still have my Tumblr account (for some reason, I never use it) so here’s a screenshot of what it looks like compare to Firefish.
My first thought was an all-in-one “life subscription,” kinda like how you can buy those iPhone + Apple One packages, but with Tesla (I don’t know if Tesla has subscriptions to them – but I’m sure they do), Twitter Blue, and Starlink. It’s pretty dystopian and hecka freaky.