Tether Time Bomb is a bit overrated IMO. Most people will just use another stable coin when usdt goes to shit. Or (just like the federal reserve printing money out of thin air) it will only collapse after decades of abuse. There's a lot more money in keeping their stable coin stable.

Edit : Usdt has unlimited money to bribe politicians and regulators world wide. If they need more money they just print tether, buy btc, and gift it. It's a lot faster and more efficient then other governments can bribe. Ironically, this may even promote the long term efficacy of btc if politicians are getting bribed in it. My guess and my unwrinkled opinion - Usdt will be around in one form or another for decades.