You know what makes Emacs feel slow?
Corporate EDR BS.
I thought Emacs was terrible to use until I realized it was extremely fast on my home computer. All the pauses that EDR does combined with Emacs mostly single threadedness is a bummer. I still daily drive it now for my IDE at work because it's workflows work better for me than others, but it is such a bummer.
It's possible to determine good values automatically: Measure your typing speed.
You can do it in the background with:
https://pavpanchekha.com/blog/emacs-keylogger.html
and periodically update the latency parameters to be just over your natural typing speed.