It's a slippery slope. TBH you're not massively far away from where I was when my train track logic kicked in. I had 2 MK23's, a TM G18C and the Hi Capa when I went HPA adapter on the capa. I then converted the mags to leightweight and the rationale was "well I've got so many pistols, lets standardise the platform" so I sold off all the none capa kit and opted to use a capa in every situation.
Less screwing around with holsters (and adjusting every time you change pistol), 1 set of mags 1 set of internals to learn, easier keeping spares tp hand and then a couple of builds for varying uses.