My advice to young people - Donald Knuth

Donald E. Knuth says something I really like in this video:
- Don't believe that because something is trendy it's good.

It reminds me a T-shirt edited by DECUS (Digital Equipment Corporation Users' Society) members in the late 80s. At this time, many CIOs decided to switch to some flavour of Unix, dumping Digital's VMS, simply because this was trendy. The T-shirt was displaying something like this:
- it's not because 50 quadrillion flies eat s*** that you have to eat s****.

(Thanks to @ValbonneConsult for the original information, presented on his web site.)