The monero POW v7 changes started at block 1546000 and we are at 1546024 now so that already happened. I don't know about any monero-wanna-be coins that may have forked off at that point or may be forking off later.
I hope we see some difficulty adjustment before 1546144, this is pretty slow... So far though the difficulty hasn't really budged. In fact it has actually crept upwards a bit which is not helping.
block 1546024 took 1hr 26m, 2s to solve!
but your right, at this rate, difficulty drop will take days. how long does it take to create new asic and start again... seems like an arms race that monero is gonna lose.