Only 500MB of storage [same as DigitalOcean's free repo] - which isn't enough

If you're self hosting, why would you use github?

Not OP but self hosting isn’t all or nothing. I self host a few things but wouldn’t currently switch from GitHub because: it’s pretty cheap, it works well, its popularity adds some useful network effects, and Actions is a nice CI solution for some projects. If I were to self host a git remote I’d probably end up still using GitHub for certain projects (especially OSS). I’d rather have all my code projects in one place for simplicity. Can’t see any strong arguments for self hosting GitHub currently, other than to satisfy a perfectionist urge to get to 100% self hosting.

Agreed. Same here. The post was about self-hosting though.