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On (1), like I said in my post; important calculus for designers worrying about commercial viability...not important to us on a message board who don’t have those same concerns.
On (2), I didn’t brush Fighter popularity in any D&D edition as irrational. My claim was that it’s impossible to tease cognitive bias (and things like cultural zeitgeist) our of the data, so drawing conclusions are fraught.
I think this is backed up by the fact that Fighter’s were enormously popular in 4e (see [MENTION=6804249]Garth[/MENTION]snos ‘s post), and is widely considered “the martial edition” due to its treatment of Fighters (among other things such as Inspiration, Defender mechanics generally, and high level class parity in and out of combat) despite the very distinctive components of its design when contrasted with other editions.
I look at those lines of evidence, and the only conclusion I’m confident making is:
“People love martial archetypes/Fighters (regardless of how they’re iterated)!”