I used to run a full size rack with servers and gear but ended up downsizing to three NUCs with 32GB in each, a simple managed Ubiquiti switch, and an 8 bay Syn

I used to run a full size rack with servers and gear but ended up downsizing to three NUCs with 32GB in each, a simple managed Ubiquiti switch, and an 8 bay Synology like the one in the article. Doesn't have the "wow factor" of the big rack of equipment, but it's a lot easier to work on, quieter, and cheaper on the electric bill.