Comment by caspar

Stash was not an acquisition. Stash was built from the ground up inside Atlassian during its golden age, by a bunch of engineers who really cared about performance. Though it helped that they didn't have Jira's 'problem' of having 8 figures of revenue hanging off a terrible database schema designed a decade ago.

You might be thinking of Fisheye/Crucible, which were acquisitions, and suffered the traditional fate of being sidelined.

(You are 100% correct that Stash/Bitbucket Server has also been sidelined, but that has everything to do with their cloud SaaS model generating more revenue than selling self-hosted licenses. The last time I used it circa 2024, it was still way faster than Bitbucket Cloud though.)

Source: worked at Atlassian for a long time but left a few years ago.