GitLab's hosted service, on the other hand, has traditionally been free and best-effort. That and they're moving hosting providers, which is definitely a non-trivial migration.
It's definitely fair to complain if you paid for the hosted version, but I think GitLab was plenty successful without monetizing GitLab.com.
GitLab prioritize breadth over depth - i.e. new features over bug fixes.
As far as I can tell, their regression testing is sub-optimal. Expanding a diff on a code review was broken in two releases.
We used GitLab CI very heavily. The only issue we hit was disk space on workers filling up - but it was easy to resolve this by making a Cron job run `docker system prune`.
Generally, the GitLab team definitely has moved very quickly on new features and that has caused things to break here and there. I also agree they could use better regression testing. Still, they are very responsive to issue reports and most of the time issues that I care about are resolved very quickly.
GitHub as a competitor obviously is a lot more stable. But, I was definitely willing to trade some stability for the features GitLab offered, and I do feel they have been steadily improving in the past year.