Don't confuse cool with nostalgia.
Don't confuse cool with "objectively good" or even "subjectively good".
The cool wall concept (whether puerile, vacuous, shallow, or merely fun) for all it's faults, is nothing to do with whether something was purely any good - although that tends to be how the votes, threads, and comments go.
Funny thing is that while I don't conciser low end groupsets as cool, I also don't consider any shimano group as cool. They are functional and practical, they are robust, long living and efficient but then none of those things are indicative of coolness...
I'd largely agree with that.
All the same, though, there's a certain retrospective (yes, I'll concede, revisionist) coolness in things that got many people started that were what they probably wore out and had fun with, along the way to something better.
That said, I'll 'fess up - I never owned a bike with these groupsets on (either now, or BITD), so I can't claim any real personal experience of them.