There's still at least one order of magnitude of performance to be had with ASICs, and honestly that's conservative. The danger is specialising such expensive

There's still at least one order of magnitude of performance to be had with ASICs, and honestly that's conservative. The danger is specialising such expensive silicon just on BTC, which is much more likely to cause a wall to be hit, rather than the raw performance that could be had if really serious resources were thrown into a very high end design on today's leading edge manufacturing processes.