I dont think technology has killed the modern 4wd, I think the buyer demographic have.
Unfortunately knowone wants a 4wd to actually go off-road in these days so they dont bother designing them to do so.
Of the only 5 new 4wds on the market that would suit my needs, 4 of them have throwbacks to the 80's - 90's lol.

New technology in 4wds can make them very capable, Jeeps quadradrive 2 system for example is very close to twin locked performance but does not require driver input at all.