I return to my computer after letting it idle to this maelstrom. Pinwheel of death to 11! Luckily I was left with at least one tool in my belt. Initial signs point to Disk I/O but with SSD?? Sometimes I feel like the cobbler with no shoes. no such thing as a day off.
UPDATE! – It was drive related, but not my boot drive. Apparently all this was caused by file system corruption on an external drive. it’s not that it wasn’t in use, but that drive was certainly not in use by all of these applications. It was a drive that contains large files that don’t require especially high performance (like my bitcoin blockchain). I must now give a shout out to DiskWarrior for saving my Sunday.