That said, I recall issues with the Gitlab Enterprise Support / whoever we contact about our license etc, mostly to do with slow or poor communication. Requests would sit for a month before we got a reply, often dismissive or generally unhelpful, though we _were_ on an outdated version so I don't blame them.
I vaguely recall an email about support ending on self hosted instances? I can't recall the details, but I know it triggered an internal investigation into moving away from Gitlab. EDIT: Pretty sure I'm remembering self hosted Jira, a quick Google search shows Jira EOL but no Gitlab.
All of that said, I largely blame my company for the failures here. I wouldn't expect any company to support self hosted, outdated versions. The support issues were annoying, but I'm also not sure how much I can blame Gitlab for that. I'm also struggling to remember the details, so take this as one mans hazy annecdote.
* film industry, security by obscurity in the worst ways, leads to incredibly outdated and neglected tech (we only _just_ transitioned to Python3, and that's only the core services)