I'm going to use my right for speculation now, sorry in advance for my extreme fantasies
So... Imagine Mark doing a masterclass on songwriting for
masterclass.com website...
It's a cool platform and it's not like he wouldn't fit, look at their lineup:
Hans Zimmer teaches film scoring
Dustin Hoffman teaches acting
Herbie Hancock teaches jazz
Garry Kasparov teaches chess
Gordon Ramsay teaches cooking
Frank Gehry teaches design and architecture
Christina Aguilera teaches singing
Mark Knopfler teaches songwriting
And so on! And most importantly—there's no any professor to teach songwriting yet!
Okay, I know this is ridiculous speculation, but why not?