I'm not concerned about tria, possessions, or stats as these can all be regained quickly enough. I am however concerned about skills built up, and not just for myself. I've spent countless hours working on getting magic up to realm four in all ways, and I simply don't think I would bother to put myself through that a second time. I would probably just roleplay and explore a bit, then pretty much give up on the game if I got bored. I suspect some others would react the same way. A wipe at this point should probably consider if it's a complete reset of everything, or something that attempts to simply remove the problematic elements allowing other things to remain.
How many players are active on EZPCUSA? That is probably a good representation of how many would play a lot post-wipe, as that was essentially a similar experience except voluntary.