My personal opinion with no substantiated evidence is that there is still a gaping hole in KGW... and if there is a KGW exploit still open and it was coordinated with a wallet port DDOS... well... it may look something like the current POT blockchain.
This is what I'm thinking too. If diff can be changed with every block then it becomes much more easy to own the network because the blocks found are valid.
Someone explain to me why these blocks
shouldn't be invalid when they were found every 3 seconds with diff of 0?