I know this is kinda besides the point now but I want to post in defense of htop that you can enable advanced CPU stats to get the iowait stats and add process state, IO read and write bytes to get a better picture at what processes eat a lot of IO ( https://serverfault.com/questions/848714/htop-show-i-o-wait-percentage )
There’s also a giant list of other optional columns like page faults to play around with in the F2 setup menu
