What's the issue with self-hosting? It's not that expensive to run a netbook 24/7 with an Onion Service. I'm doing that for my FreedomBox with radicale etc. ATM

What's the issue with self-hosting? It's not that expensive to run a netbook 24/7 with an Onion Service. I'm doing that for my FreedomBox with radicale etc. ATM. There's no overhead costs like static IP or hostname. I can agree with the point of "average user lacks the skills" so that's something that needs good tutorials. But then there's apps like Briar that just run on your phone, that bring the complexity down to these users.