It would probably take a lot of information to its grave, but the more known "servers" would probably get crawled by archive teams.
Also - assuming Discord wouldn't be replaced by something equally closed off from easy public access - all new information would be easier to access.
When Discord started, they marketed it primarily as a voice chat software for gaming. I remember them marketing it as "superior audio quality to TeamSpeak" or similar wording (which by the way wasn't the case). It obviously has chat, video chat and screen sharing conveniently built in which TeamSpeak is only starting to add now in 2025 with the TS6 beta (they seem kind of lost atm).
I always preferred the decentralized nature of TeamSpeak and Mumble though and at least from my own experience, TS tends to work better with fewer connection issues and better autogain and voice leveling.
I don't like the fact that most people happily gave up decentralized voice chat for a centralized alternative and we still use TeamSpeak in most of my circles to this day.
For those on iOS: there's an app called "Vinegar" that replaces the YouTube player with a vanilla HTML5 player that supports background/PiP play without YT Premium.
Alternatively on iPhones with "dynamic island", minimize Safari while a video is playing, quickly tap-and-hold the dynamic island area and resume playback. After that you can lock your device and audio will continue playing.