I was a huge Gitlab fan until their pricing change. I don't remember the pricing specifics, but the tier breakdown was such that you could introduce GitLab for free to a company that used Github, use it alongside Github, and slowly switch repo by repo, which was a very effective strategy (I used it in a few companies I joined).
After the pricing change, you had to start paying immediately (from the 6th user onwards or something), which made it a nonstarter because no company would start immediately paying for a Github replacement they didn't even know they wanted.
Together with Github being priced very cheaply, plus having free private repos, plus having the entire OSS world on it (for my OSS projects), I switched to it and never looked back.
After the pricing change, you had to start paying immediately (from the 6th user onwards or something), which made it a nonstarter because no company would start immediately paying for a Github replacement they didn't even know they wanted.
Together with Github being priced very cheaply, plus having free private repos, plus having the entire OSS world on it (for my OSS projects), I switched to it and never looked back.