In 2014 I set up GitLab for my then employer. It had to be something self hosted because of client requirements. I was apparently the only one in a company of about 200 that knew anything about Linux.

Wasn't too bad, just keeping it up to date etc. When I left in 2016 I'd just upgraded the server to ubuntu 16.04. It's probably still running that now. I know someone who is still there and they've said GitLab itself hasn't been updated since I left.