I remember Dawes back in the day. They had / have a very "traditional" cyclist flat cap and touring bikes images. In the early nineties mountain biking was as far away from this as you could get, the US brands Specialized GT etc were FAR cooler. We didn't see ourselves as "cyclists", we were cool MTBers dammit! Dawes didn't try to compete with this (they couldn't?) so didn't sell many.
Nowt wrong with the bikes, in fact they were pretty good, but brand image didn't fit the "new, fresh, exciting" MTB market. The top line "the edge" bike would always draw respect though!
Nowadays flat caps, touring bikes, cyclo cross, road bikes and lugged craftsman built construction are all back in fashion, so we are drawn to these classic MTB's.
I would say a 90's mid-high end Dawes is more desirable now than it was when it was new.