It might have already been said, but I'll add to it. I've heard a lot of talk from a lot of people that they'd rather not rejoin the server until after a reset, simply for the fact that the update is coming out in spring. So we are losing long term players the longer we don't reset with the update.
And with the amount of conversations with the same people I've had over and over again about there not being any plans for a reset, many are still dead set on believing one exists. So no matter how much of a guarantee we give, those players are not coming back until we reset.
On top of that, I also have a massive end base. It's taken me over a year to build just the terrain, and it's still not even finished, mainly because it's getting boring. However, I'd still truly love to see this base completed, and I'd hate to lose the builds on this map that I am proud of. But for a reset that would fix mansions, evenly generate new ocean biomes and structures, and give me a chance to start fresh with a whole new set of ideas, I'd happily give up my base for that. Just like Tez said, we should be used to this cycle by now. It's just how a griefing/raiding server works. We build, we lose, we learn, we build again, and this time, better.