Moved from heroku to fly.io three years ago and I don’t regret it, great platform occasionally goes down and requires a bit of attention but the support forum is great
Fly.io are absolute G’s. The product is awesome and the tech blogs they write are fantastic.
It didn't seem quite as fire-and-forget as doing `Heroku create` when I tried to use it 3-4 years ago, especially the database setup. Do you use their Postgres offering?
I had an issue with one of my Sprites (Fly.io also runs sprites.dev) and the CEO responded to me personally in less than 10 minutes. They got it fixed quickly.
I was a free customer at the time. I pay for it happily now.