All of my personal Macs became unusable about an hour ago. Fan would kick up, CPU gets loaded, and every operation comes to a crawl. Thankfully it seems a PRAM

All of my personal Macs became unusable about an hour ago. Fan would kick up, CPU gets loaded, and every operation comes to a crawl. Thankfully it seems a PRAM and SMC reset solved the issue. Wondering if what's going on here is related. It would be quite the coincidence if not.