Never built one myself but I did grow up in the era where creating a Beowulf cluster out of something unusual was common internet humor for geeks. The last one

Never built one myself but I did grow up in the era where creating a Beowulf cluster out of something unusual was common internet humor for geeks. The last one I remember seeing was using an early model of Raspberry Pis, and most the comments were (sadly) about how Beowulf clusters aren't useful anymore (true, but irrelevant) and how it was a waste of time (objectively false). A great piece of early (or just earlier) internet died for me that day.