Yeah, recognize the OP's compulsion. I had the same history, at about 40 I bought a second body. For 15 years I'd had one body and 3 or 4 lenses. Then when I reached 40 something snapped and, starting with that second OM-1 there was an explosion of GAS. At one time I had 90 to 100 cameras. Just in the last 2 or 3 years, now in my mid 60's, the madness left. I still have way too many cameras but have divested myself of at least half and the rest are going away slowly. I think I'll finally wind up with, in 35mm, an OM-1md, OM-4Ti, a Pen F and 10 or 12 Zuiko's (that includes 6 half frame Zuiko's)
I also dabble in 4X5 and, if if it ever arrives, I'll have a Trevelwide 90. I sorta backed into 4X5. Four or five years ago I stumbled on 6 filmholders at a garage sale for $5. Up till then I hadn't considered it but once I came home with those 4X5 DDS's.........well, what could I do? I bought a ratty camera that had been a u-build kit from Calumet in the early 80's for $25, took it apart and built it into a serviceable but simple 4X5