In Azure DevOps pipelines there's a fun issue where if you're pulling a dependency from nuget.org it gets pulled very quickly, but pulling from your own artifact repositories hosted in the very same Azure DevOps instance take 40-80 seconds. I'm not the one paying the extra bills when my builds take 5 to 6 times longer than they should but it's still frustrating.
And Microsoft has effectively zero incentive to fix this because it still technically works and they get to charge my employer for all that extra build agent time. Here's a few examples of people reporting similar issues and getting zero help:
https://developercommunity.visualstudio.com/t/devops-build-p...
https://developercommunity.visualstudio.com/t/nuget-restore-...
https://developercommunity.visualstudio.com/t/slow-performan...