The only thing I don't like is their usage-based pricing. On Heroku I could pay $7 a month and know I'd never be charged more than that. I'm sure when you're scaling a service it's fine - maybe even better - to do it on a sliding scale. But for a fire-and-forget blog site, I don't want to have to worry about stuff like that.
This is the reason I use Heroku and would never on a personal level use some of the bigger solutions, or apparently Fly.io. As an individual and despite being generally careful, I just cannot have a tiny risk of having a $100k+ accidental bill. I'd rather my project goes down if there's a DDOS attack, or if I made a typo and created an infinite loop. If I take some of my hobby projects to the "next level", it'd be def behind a LTD company.
Is it possible to rack up a 100k+ bill with personal projects on platforms like fly.io? Like some absolutely massive DDOS or something?