I've "acquired" 5 in the last 10 years. Started playing casually around 92/93 (concurrently with guitar about a year earlier). Didn't own anything at the time but would play friends' and in stores. Finally bought a bass around 99 (Kramer aluminum neck, X-20 or something like that). Played that semi seriously in a band or 2 that never gigged over the next few years (I was always focused more on guitar and keys). Around the early 2000s I acquired a Carvin LB-20 fretless from a friend on permanent loan (also his Bassman 10, although it's been out of commission for some time due to some minor repairs needed). Started playing more seriously around late 2000s (ie about 10 years ago). But focused on the amp situation first. Shortly thereafter (2012?) got loaned another Carvin (fretted LB70P) from a different friend, which became my main bass. So that's the first one acquired in the last 10 years. Still have it. Bought another bass for the first time since the Kramer around 2015, Yamaha fretted passive 5 string. That then became my main bass. Then in 2017, I got a better job and had a lot more disposable income. So first I bough a cool vintage 80s Yamaha P (BB300). Then that summer I got my beautiful 94ish Carvin LB76 (6 string, for those not familiar). So that kind of alternated with the Yam 5 string (I call it the Yam because of the make and also because it's got an orange metallic mist finish) as my main, but eventually I started mostly using the 6. Then just a few months ago, someone traded me one of the early Indonesian Squier P5s (with jazz pickups from the factory though, weird), circa late 90s/early 00s I believe. So that's going to be my "old school" sounding bass which I'll put flats on. May pull the frets off as well if I get really crazy. But probably a 5 string fretted with flats and pass J pickups will be a good beater when I want that kind of sound. Not gigging a ton right now, but my intent would be to keep it to 2-3 basses for a full length gig (ie 3 or 4 sets), and any others would mainly be for practice and recording and just to change out when I feel like it. A 5 or 6 string fretted with rounds will always be the primary though. I just like having that low B too much, and I need the crispness of rounds for my primary sound (can always roll off the tone knob to get more vintage sounds, but can't do the reverse at all). So I haven't sold any basses at all. Acquired 5 in the last 10 years and have 7 overall. I'll probably try to keep the total to about 10, and once I have all the "slots" filled (of different types), then the process of upgrading each slot will commence. I still want a 5 or 6 string fretless, an 8 string, maybe a doubleneck with a 6 or 12 string guitar, etc... But "10" is just an ideal. If I get to a point where I find number 11 and can't figure out which one to sell because I love them all, I'm not going to dump it anyway. It's just an arbitrary "rule" to keep things from getting too out of hand. Now, amps and cabs I've bought a ton and sold a handful. I have a pretty good selection of heads and cabs now, so I need to shed at least a couple of the cabs because they take up a ton of space that I don't really have. But I will probably always at least have big, medium, and small modern cabs plus a medium to large vintage (or vintage style) cab.