seems like in the last ten years certain genres have become obsessed with upright and you now see them far more often now than you use to.
As a former bluegrasser who was playing BG back then, there's no doubt that in genres like bluegrass, rockabilly and jazz the DB had always been desired. What changed is that it's easier to buy and service DBs today than it has been for decades.
When I bought my first DB in 1981, buying a bass or getting one serviced was like buying drugs. You had to know someone who knew someone, etc. Violin shops would not work on basses, nothing larger than a cello. Strings and rosin were always special orders, the only pickups or preamps you could buy locally were Fishman because some stores carried their guitar stuff.
Things have changed for the better, perhaps because the Internet made it easier for players to hook up with merchants.
Bob (all hail!) Gollihur started posting on Usenet, then created a resource webpage for DB players, then started selling pickups and today is a full service bass dealer selling basses, amps, pickups, strings, bows and accessories.
Upton Bass in CT started out as a small repair shop, they now build their own basses and pickups. And so on...it's just a golden age for DB again.