"... Just because a book contains lots of information that you don’t know, it doesn’t necessarily mean that it will be extremely helpful in making you better at this point in your chess development. ..." - Dan Heisman (2001)
https://web.archive.org/web/20140626180930/http://www.chesscafe.com/text/heisman06.pdf
A My System sample can be seen at:
https://www.qualitychess.co.uk/ebooks/MySystem-excerpt.pdf
How important is "My System"?

Has anyone seen this video series?
Killegar Chess Presents: "My System" by Aron Nimzowitsch

By the way, how does one get to NM?
By not reading "My System"
Very astute
I don't like it either, I don't like Nimzowitsch's writing style or his similaes to real life, he's also kind of passive aggressive. I still can't figure out what point he tries to make about what he calls "hanging pawns" or how it's meant to be useful.
I think Tarrasch's The Game of Chess is the best book for learning the main principles. Honestly I think the whole "hypermodern revolution led by Nimzowitsch" was just a bunch of nonsense. Sure controlling the centre from afar turned out to be better than had been thought, that's not really a revolution, plenty of things turn out different to original theory.
For what it's worth Nimzowitsch came from a wealthy Jewish family, which I found out many years after forming my opinion and it might answer a few questions.
After working with some chapter I began to change positively my concepts on the importance of passed pawns, outposts and rooks on open lines and 7th rank. If the book is good enough for uncountable strong players, IMs, GMs and super GMs, it is good enough for me 😎