Performance just isn't prioritized. If you spend a week optimizing making something faster, you just get hit with the ill-quoted premature optimization line and shamed for not working on higher priority tickets. Fine, I'll just leave it slow then.
>> you just get hit with the ill-quoted premature optimization line
Frankly, if someone says that to you and they're not shipping software that runs locked at 60fps, fuck them.
My defense is usually that it's ok to have a little pride of craftsmanship, and if you let people scratch that itch they'll be happier and more content in their jobs, making it a long-term cost saver.