Bitcoin normally adjusts the difficulty every 2 weeks. If half the miners leave, those 2 weeks turn into 4 weeks. If 90% of the miners leave, it will be 20 weeks.
Bitcoin Cash now has about 30 blocks per hour, instead of the 6 it should mine. It's the ping-ponig result of the emergency difficulty adjustment it has.
https://electroncash.org/ says there will be a hard fork on Bitcoin Cash on November 13th, and I assume that will end the emergency difficulty adjustment.
I understand why miners LOVE to get 30 blocks per hour, it's easy money. What I don't understand, is why people start buying their Bitcoin Cash for a higher price when they mine more. It
must be a pump, and that will most likely end in a Bitcoin Cash crash again.
Meanwhile, Bitcoin fees are higher than ever, $10 isn't enough anymore for the smallest transaction. I'm more and more starting to think the small blocks are actually meant to create FUD, forks and pump&dump actions! Some people must be earning a lot of money from this.
If Bitcoin Core would have increased blocksize long before fees spiked, and long before miners earned
millions of dollars per day from fees, all this would never have happened. I now can't even use Bitcoin for online food orders anymore, as the fee would double the price.