The naysayers will say that he did it with oxygen and talk smack but the reality is that using O2 is a perfectly valid way to do it - just as is doing it without O2. Of course you cannot compare speed with the two methods (meaning obviously doing it with O2 should help you do it faster) but at the top elite level there is nobody actually looking down on those who use bottled oxygen. This guy basically assembled a superhuman team of climbers and perfectly executed a style of climbing I might describe as semi-Alpine style and achieved in 7 months what used to take people 10 years.
The other awesome thing about this is that the Sherpas have essentially been doing this for years and years and never really getting the kind of credit and attention they deserve - all the big ascents we remember the western explorers who are paying for their help - but in fact pretty much every ascent relies on their skills. They are superstars in their hometowns but Nims has really brought them more into the spotlight and that is just awesome. I don't do much social media or follow really any famous people but if you checkout the Instagram accounts for example of some of the more active Sherpas it is actually super interesting.
In terms of Nims himself a very interesting part of the book / various documentaries is the sheer amount of funding work he was able to accomplish and also the just ridiculous amount of red tape and permitting and logistics that he pulled off. To top all off this is during Covid lockdowns which of course throws a whole wrench in planning. And they filmed the entire thing!