Obscure bands with extensive discographies

Bull of Heaven! Never heard their name outside of RYM, which it seemed like the band existed for. One of their albums lasts 8.5 billion years!

I suppose it's all loops?

Jute Gyte! Are there many metal bands that prolific?

There's a Russian one-man project called Senmuth that managed 163 between 2004-2012 according to RYM. I think some of it's meant to be more experimental/ambient stuff but I haven't heard any of it to be honest.

Njiqahdda (along with their alternate names Njijn and Oaks of Bethel) were very productive for a while, still active but less so now. Some of their stuff's pretty good.

There's Zarach Baal Tharagh who seems to have over 100. What I've heard is pretty shit though.

xp to myself: 163 albums I mean. But that's only as recent as RYM goes, according to metal archives this guy still consistently dumps out a shit-ton of albums every year, including 3 in 2017 already. Doesn't say much for quality control.

I suppose it's all loops?

only one way to find out!!

brb, see u in 8.5 billion years