I have to bring up geometry here. Modern frames all cater for a long travel fork/larger wheels and so always look bolt upright. Older 1980's frames were limited to the availability of frame parts so unless you custom manufactured your own lugs & drop-outs you only had a few options, mostly road based. That obviously changed quite quickly as tubing manufacturers brought out MTB specific tubing/ lugs/ drop-outs
Into the early 1990's it was arse up nose down fast XC, still very road biased with the odd high BB model for low speed technical terrain.
As suspension travel/ quality improved, a separate branch of the mountain bike family took over leaving a bike like a steel Orange Clockwork looking very out of fashion despite its capabilities.
I've ridden a few of the current designs and find them too bolt upright. I'm a child of the late 80's and early 90's so a new bike feels too short and upright
So its not heresy as such but history - its another country - they do things differently there.