The few that I’ve used either require too much force to connect, or are just friction-fit only (like those Neutrik combo XLR + 1/4" receptacles you find on audio interfaces), but I’ll take your word for it. XLR looks like it should feel solid.
TRUE especially since the pins are tiny. I bent two of them inside the shroud somehow and they snapped, so now I only have one front USB 3.0 port.
Plex does alright at suggesting music from your own library, and also has some really nice DJ-like song transitions that are legitimately way better than any other track fades. However, Plex users have been frustrated with the company’s slow response to fixing long-standing bugs, and some of the features are paid. It’s also not open-source.
No idea if it can suggest music that isn’t in your library; I know that they integrate with Tidal though, so maybe if you have that it’ll also suggest stuff from Tidal?