I get the impression that Gitlab focuses a little too much on releasing new features at a rapid pace with every release. Maybe they should spend more time on running their infrastructure reliably and getting their engineering practices up to speed. The recent events will raise a red flag with enterprises who might be potential Gitlab customers and that directly affects their bottomline.
If anything, enterprises can rest easy, because the next version has already been running in the wild, with a real world group of users running on it.
This was a first RC. It's fairly normal that infrastructure problems can arise here.