Having adopted a number of development tools, including Jira and Confluence, it’s amazing people let them sit there chugging away on underpowered machines with hundreds of users quietly complaining about the speed. Throwing some extra CPU cores and memory is so cheap for the quality of life improvement, let alone the productivity gain.
The concurrent (human) user counts at even large companies is probably a couple dozen at most.
Usually with these tools, the performance problems magically vanish if you disable all the integrations people have set up. My company is constantly denial of service attacking Jira with Github updates, for example.
I delivered a complex, highly customized enterprise back-office system for a large Fortune 500 some time back. It involved a handful of servers (all as VM's), x3 to accommodate DEV/QA/PROD staging.
It worked great in volume testing in our environment. Their IT department installed it on high end servers (hundreds of cores, incredibly expensive storage subsystems, etc) but users complained of latency, random slowness, etc. IT spent weeks investigating and swore up and down it wasn't their end and must be a software issue. We replicated and completely sanitized production volumes of data to try and recreate locally and couldn't.
Finally I flew down and hosted their entire infrastructure off my laptop for a day (I'll skip all the security safeguards, contract assurances, secure wipes, etc). It flew like a thoroughbread at a racetrack. No latency, instant responsiveness, no timeouts, no hiccups. Their entire staff raved about the difference. The results gave the business unit VP what she needed to bypass the usual, convoluted channels, and someone must have lit a fire under their IT VP - by the end of that day their internal techs identified a misconfiguration on their storage arrays and solved the problem. I can only guess how many other apps were silently suffering for weeks or months on the same array. I joked I'd be happy to sell them a laptop or two for a fraction of their mainframe cost.
I had the experience for a few years of having to run all of the self-hosted development and project management tooling for a government project about a decade back, and the integrations part holds up strong to that experience. The CI system that had been put in place was probably the most sophisticated I've ever seen, but that had some unfortunate side effects like Jenkins jobs being kicked off automatically thousands of times an hour, blasting all of the Atlassian tools with network requests, or Nessus remote logging into and spawning 40,000 simultaneous processes on the servers actually hosting the Atlassian tools.
People complaining about JIRA has become enough of a trope that it mostly gets ignored.
Also big enough corps give underpowered machines to the mass of employees (anyone not a dev, designer or lead of something) so latency is just life to them.
