I had to upgrade a slightly older, internal-only GitLab instance for a company a while ago. I was shocked by how many upgrade path dependency problems there were. Ended up having to roll back to a backup and do the upgrade in a stepwise fashion through various intermediate steps according to their long document on the process, including a fair number of manual commands and migrations and a lot of Googling for obscure error messages.

I enjoy GitLab and it’s the real only option for open self-hosting, but it made me miss the days of having GitHub Enterprise.