Hey Tex68w, just wanted to comment on your well thought out and detailed post above.
I too am an engineer and also believe in KISS (especially since I'm an R&D engineer and need my designs to transfer into manufacturing). But... per your comments about wiz-bang gizmos that we have now that in days past (at least in the Toyota world) were manual e.g. locking hubs, transfer case lever, etc., that is the primary reason I
drive a Toyota product, for the reliability. A quick side note, even the almighty Jeep owners have to swap out their axles and pumpkins when they start going larger than 35" tires or they're breaking things, not to mention the Chrysler engine

, again that's why my family and I drive Toyota products.
I hit my 60th birthday this year. My wife and I still love to surf, ski, hike, camp, cycle, etc. but yes, I like my heated seats when wheeling in the winter, cooled seats and 3 climate zones when wheeling in the summer. I like to be able to electronically swing my rear view mirrors in with a push of a button in tight places. I like the cushy seats and great sound system. Maybe I'm in the minority, but my wife and I are in a local four wheeling club and we go out and do trails about once a month (maybe a little less in summer) with most trips being over nighters. My wife has an '07 Taco crewcab 4x4 with factory e-locker and she loves taking that on the trail. But to tell the truth, after 8 hours on a trail going through rock fields, rutted trails and wash board, I'm not feeling it quite as much as when we take her truck.
Funny thing about you mentioning purpose built, trailer out the trail rigs, I'm seeing more and more "side-by-sides" I believe they're called. Have to admit they look fun, but so do the extreme trailered off road rigs. This is me (and my wife) we just don't like the idea of having to trailer a toy! Also, we live about 100 feet from the ocean, which means we have NO extra space for a trailer of ANY kind! I can barely get to my tools in our one car garage because it's so full of surfboards, paddle boards, bicycles and my granddaughters toys. So another reason we just couldn't go that route.
And my final point, is that many, including myself never have plans on "rock-crawling" our rigs with >37" tires and an exo-skeleton cage. I think the community is looking for a very capable off roader that if necessary can get them out of most predicaments. Yes I could do rock crawling with my rig, but I'm not into buckling my panels. I don't mind trail pin striping, but I don't want to abuse my rig. That is when you want something that is usually trailered in.
So in closing, I must qualify that everything above is from my own point of view and not to offend anyone.
I'm in a rush right now, so I may go back a append this when I get a chance to re-read my rant...