I tend to consolidate, to an extent. I don't like to stock too many different types of ammo, and I like my go-to weapons to share some handling characteristics, such as pointability and trigger stroke length, to economize on training time and ammo expended.
My autopistols tend to be SIG, P229, DAK, chambered for .40 S&W. Three of them are on my virtual "qual card" as primary duty pistols, and a fourth, which is actually DA/SA, as an off-duty pistol. I have one more with which I have not qual'ed. The mandated primary duty cartridge of my employer is .40 S&W, and we buy our own weapons, guided by a list of approved weapons. I do have a factory 357 SIG barrel, and a Bar-sto 9mm conversion barrel, but presently carry .40 all the time. In the dark days of the post-election ammo shortage, I could find 357 ammo easily, while .40 was scarce. The 9mm conversion barrel is primarily for lower-cost, lower-recoil training.
I do own one 1911, a Les Baer TRS, from my 1911 days. I may carry it again someday, but my time to train is limited, and my ammo budget is limited, so I concentrate on long-stroke DA practice.
I have a Seecamp LWS-32, which has a long-stroke DA trigger, like my DAK SIGs and DA revolvers.
My DA revolvers tend to be .357 Magnum. I do have my old .41 Mag duty sixgun, but it is largely retired to the safe, and two J-frame .38 snubs, which I rarely use. I have an S&W Model 17, chambered in .22 LR, which acts as a trainer for all of my DA handguns, as the SIG DAK system's trigger is much like a K-frame trigger pull. I use the .357 revolvers for back-up, utility, and fun guns.
My fun guns also include single action revolvers, which thus far are all chambered in .45 Colt, with one having a spare cylinder chambered in .45 ACP.