[sam_bristow]

I believe Bitbucket Cloud and Bitbucket Server/Datacenter (nee Stash) are still two completely separate codebases that just happen to share a name.

[politelemon]

And, probably for worse, Atlassian is ending support for server in favour of their worse cloud version.

https://www.atlassian.com/migration/assess/journey-to-cloud

There's still data center version but it's priced expensive to discourage you.