HipChat was a declining dumpster fire with endless outages, so they thought they’d make a new chat platform from scratch (Stride)
So all the development effort was on Stride from that point. It was released, no one used it, and then under a year later it was shitcanned and “sold” to Slack. The dev team was RIF’d. Good shit!
The HipChat “server” was just a weird fork of the “cloud” version. JIRA and Confluent cloud started off as containerized versions of their on-prem versions. Then they did a big rewrite to make them actually multi-tenant.
I haven’t been keeping up but Stash was definitely not the priority at the time.
We also left HipChat for Slack shortly after leaving our own OpenFire server for HipChat. We recently left JSM for Zendesk because it apparently is way easier to get quality statistics out of it.
We have shadow IT programs all over the company using something other than Jira even though that's the standard the company provides.
We're moving from on-prem Confluence to cloud, but there are still many grumbles about it vs something as simple as FOSWiki or MediaWiki.