Wow, you're right, USDT is much more prevalent in the largest markets than I would have suspected. Is this a first mover effect? As far as I can tell USDT is the shakiest and least compelling stable.
It would wash out a lot of the accumulated speculative value and hopefully lead to a much more confident regulatory framework for the interface between blockchain money and real world money. It would also long-term strengthen fully decentralized aspects of the crypto ecosystem while flushing out those that don't really function independently of traditional finance but instead accumulate speculative valuation based on an unsafe interface with fiat and the financial sector.
Winners all around (except for crypto speculators)?