[pwg]

> It seems it has ~~degenerated~~ evolved to a niche file sharing platform for obscure contents?

While it has done so in a "total bytes transferred daily" metric manner, there are still active groups.

comp.misc has a reasonable amount of misc. computer related posts (and some amount of off-topic that one needs to tune their killfile to exclude)

comp.os.linux.misc has a fair amount of traffic at the moment (although the volume does vary over time).

You can get free access with an ES account (https://www.eternal-september.org/).