I think in most cases is to gather data to be able to better predict performance of a feature. Like discord asking what you thought of the call. It is probably to optimize the bitrate of the streaming audio or video stream where it is acceptable but still as low as possible. Also i think it is to just have metrics, some graphs to compare and such.

Very accurate description of my life, now what do I do about it?

Stupid question: what does this mean?

What replacements did you settle on?

EndevourOS, running gnome and x11 for better gaming performance.