When I started working as a photographer, someone very famous told me to buy a couple of Nikon FM2ns and the lenses I needed. Being twenty something, I paid no attention. Over the next few years I went through Contax, Olympus OM and Leica R systems. They all had great lenses but reliability problems abounded with all of them. Later when I got given pool equipment I carried 2 F90x cameras, a 28-70 f2.8 (Tokina first, then Nikon later when they made one) and an 80-200 plus 2 SB-26 speedlights and a bunch of cords, cables, film and batteries. That all slowed me down enough that it nearly got me killed me once or twice so eventually I bought two FM2ns, a 28/2.8 AiS, a 50/1.4 AiS and an 85/1.4 AiS. Later I bought an M6 and 35 and 50 Summicrons and a C-V 75 and later a 75 Summilux.
I did better underwater - Nikonos until digital, and am still working there with a housed D700.
And that's just in 135/hand cameras...without the Rolleiflexes, Hasselblads, various field cameras, a monorail studio set-up and who knows what else.
I also have about 3 darkrooms worth of enlargers.
Writing this I actually wonder if I have a problem. Well, more of a problem than I already knew I had, anyway...
Marty