Surprisingly, Mastodon is the first application where I actively regret self-hosting it.
I mean, eating 1.3GB of RAM after a few days of stabilizing is one thing, but also eating 16GB of HDD just for caching avatars and preview_cards is kinda ridiculous. (And I'm not even talking about media attachments - there is a task to purge old attachments, which makes them manageable).
Just my private Mastodon instance. Move along.