I grew up with one bass. For 25 years, I owned one bass. No one I knew had 2, not even the pro's, Chris Dreja in the Yardbirds, John McVie in Fleetwood mac, Noel Redding with Hendrix, I saw them all trying to fix their bass before they could start the gig.
It wasn't until much later, when I guess CNC machines had started to lower the prices, that owning a "collection" became a thing. I still have one bass that does 99% of my gigs.