Pi clusters aren't dumb

Pi clusters aren't dumb ...and the video I just posted on the Mars 400 explores the topic a bit more. But every time I've posted a video, blog post, tweet (xeet?), or anything else on the topic of Pi clusters, a common sentiment is "you can do that faster and cheaper with a set of VMs." Or, during the Pi shortage (which is basically over), when you could only buy Pis from scalpers for insane markups, the sentiment was "you can do that faster and for the same price with a bunch of used mini PCs....