I think the best explanation as to the difference between a library and a framework that I’ve heard so far is this:

A library is something you use to do a specific thing in your project. A framework is something you build your entire project around.

Obviously the only correct way to blink an LED is to use a hardware timer to trigger a DMA transfer which stores a bit in the pin toggle register at a set interval

One thing navidrome cannot do is to have different music available per user. A workaround for that is yo host multiple instances using docker and have them access different folders for music but that’s obviously not ideal.