If .NET resets, the server will be done. People will not stick around if you remove their items no matter what you promise in return. The fact they have items here is keeping them here and not on a different server. I mean, you have a Skyblock server on MV for some reason. You should be linking them here.
It's possible. Don't let pessimism get in the way, and block out the possibilities. Some people can't seem to broaden their perspectives, and see things differently than they want to see it. I've seen players saying a reset would kill the server. Keep in mind it's just a realm, but I reset my realm, and it ended up doubling my playerbase which is still growing. So don't be so quick to deem resetting skyblock as something that would kill the server. It's entirely possible that a reset could revive things. I hope for the sake of the server that it gets revived, it's not like it's impossible.