[politelemon]

Bitbucket Server and Gitlab have this feature and it's quite useful for very large pull requests as you can easily see the folder structure of the file you're reviewing, for that bit extra bit of visual context. Bitbucket's search box is slightly better because it also does a code search within the PR, it helps you quickly find specific words (say, a class name) across all the changed files. Gitlab's only does a file name filter.

Though relatively late, I am glad it's coming to Github, more people can benefit from this kind of pull request presentation.

[wdb]

Gitlab and big PR aren't a great experience. Impossible to scroll -- it's so slow

[mrrsm]

If only Bitbucket Cloud would play catchup now. So many times I read about a bitbucket feature to only find out it is server only and we can't use it.

[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.