For reference, that "some guy" is Andy Pavlo, a professor of databases at Carnegie Mellon. He has a lot of neat writeups online, like this annual review of new database systems [0]. He puts up lectures on the internet for free too.
Having been to Dr. Pavlo's office - or at least, one of them - I can attest to there being multiple cardboard boxes filled with gifted shirts from different companies. One of my favorite designs was actually from CMU's DB group itself - it has a little "this database kills fascists" tag on it, with a skull motif :D
[0]: https://ottertune.com/blog/2022-databases-retrospective