From personal experience, if you’re hosting Gitlab and make it available to the internet, make sure to keep it updated or your server will be super slow hosting a crypto miner within a year.

Depends on what you’re doing.

If you want free offsite backups, collaboration with others, integration with other tools, etc., then self-hosting is the worst option.

Though the topic is git forges, so then the question is which one do you self host?