On skyblock, whenever you visit the nether theres a message that says "Nether resets periodically" but I cant remember the last time I went through a nether portal without there being a mess of cobblestone and wood surrounding me from other players that visited the nether. It gets quite annoying trying to find unraided nether fortresses, mainly because they've all been looted. The nether is just a mess. I think it should be reset.
I could see an automated reset once at the start of the month or at least every 3 months. It would make the nether more active as we can't even use it for a nether hub.