The tone of your comment sounds like you think I said one should never look at performance. I do this professionally, I should hope folks out there need performance. Let me be clear: A developer should place performance priority in the Right Place, and a good dev will know where that is.

Would you mind linking a few of these studies? I'm curious as to what the point of diminishing returns is.

nngroup [0] says that 100ms feels instantaneous. A good digest cycle run (the basic unit of Angular performance) is 16ms, a mediocre one is 20ms. So a mediocre application has 5x space to grow before the app stops feeling instantaneous.

[0] https://www.nngroup.com/articles/website-response-times/