When our firm moved to git, Github and Gitlab were chosen as options and since gitlab gave us a better offer, we took it. However, the firm also uses Jira and now we are getting a better offer with Jira, Confluence and bitbucket. Eventhough Gitlab is loved by our team, It looks like Bitbucket will be the future for us. So you should not underestimate the market presence of a company.
It is a mistake to let the issue tracker (Jira) drive tool selection instead of the developer tools (configuration management, continuous integration). Be cautious of the switch if your company is switching for that reason.
The problem is that we are a team of 12 use the versioning, while more than 500 people of various teams use Jira and Atlassian toolset ( Whose jobs dont require versioning, as we create tools that hide/simplify the process for them).
