Philosophically, I like Fly and have been a customer since very early on.
That said, I dread having to do anything CLI related, which for hobby projects is like once every few weeks.
Glancing at the docs for Sprite, I worry that this will be another CLI where a good 95% of the time that I go to invoke a command, my workflow is interrupted by an auto-updater that takes longer than whatever interaction I'm trying to do and derails my train of thought.
Same. Abandoned fly for Digital Ocean when I found myself hitting my head against the wall trying to get their "just works" to work too often.