Bitcoiners verify and all those things just show how Bitcoiners think ahead and take actions to try mitigate any risks. We have acked it long ago as a risk but we also need to be real about it. Monero hashrate has been 4.99 GH/s at the period of attack (I know they use CPUs ..). I run 1000GH/s on my Bitaxe Gamma. Bitcoin hashrate is 950 EH/s which of course has its cost.