If my memory serves, I think the most rods I've had at any one time was upwards of fifty. It's nowhere near that now as I sold a lot of them when I was made redundant and over the subsequent few years when I worked for myself. I've certainly owned perhaps two hundred and fifty rods over the years. However, I can honestly say I've never had a rod I didn't use, and any that remain unused for more than a year usually get passed on. This is just as well, as it doesn't take long to acquire replacements.
I hardly ever buy new rods. Not because I don't want to pay full price, but because I don't like the design, fittings and finish of modern rods. I am not a fan of fixed reel seats or those silly duplon handles with a token strip of cork in the middle (where you never hold the rod anyway) which I'm sure is put there just so they can say it has a cork handle, and I don't care for the modern trend in using single-leg stand-off float rod rings all the way up the rod, necessitating the use of an over-heavy application of epoxy to hold them in place.
The best float rods in my opinion were made between 1980 and 1995, give or take a year. Rods such as the Shakespeare Mach 2 boron, the original Normark Microlights and, the best of the lot, the Daiwa Kevlar and Amorphous/Connoisseur ranges. The earliest Drennan rods were very good, and Tricast made some excellent rods too, though I've only ever had one feeder rod of theirs. Even some of the first Silstar-branded rods (which were more-or-less identical to the Shakespeare equivalents, as I believe they were made by the same people anyway) were right up there, better than anything you can get today.
I still have a modest bundle of cane rods I use when the mood takes me, but many of the more unusual ones I once had have been sold. I stick to the Wallis Avons/Wizards, MkIV Avon and MkIV carp rods now, which cover most species and methods, plus a few cane fly rods. I also have a few glass fibre rods which work very well. I don't know exactly how many rods I now own, but I think it's around 25.
Reels are so much easier; I've used all the main Shimano and Daiwa models over the years, but always end up selling them and going back to my ancient and beloved Mitchells, with a couple of ABU closed-faces for light lines.