LOL
Well, since you ask, Craig, I'm actually maintaining
three systems - DSLR, SLT and mirrorless
The DSLR system is all my K-mount Pentax gear - my main "go to" equipment. I could never let go of that, as my preference is for an optical "through the lens" view. The SLT system is my Hasselblad HV, a vanity purchase from a few years back which has evolved into a fully-fledged Sony A-mount / Minolta AF-mount system that I love using, though nothing like so often as my Pentax DSLRs. Then, the mirrorless system is my E-mount A7 MkII which I use primarily for adapted vintage lenses from SLRs, rangefinders and more (due to the short flange focal distance, it works with lenses that neither my K or A-mount systems can), but it also serves as a backup to my Hasselblad HV when used with the LA-EA4 SLT AF adapter.
I do *not* recommend this approach to anyone with an ounce of common sense or limited budget... but it kind of works for me (though my budget is definitely limited!)
Ideally, I'd have a much more slimmed-down kit based on my K-mount DSLRs and a MILC with properly-integrated K-mount AF adapter, so I can use it with adapted vintage lenses and K-mount AF glass... but I don't believe such a beast will be available any time soon
So, as you can see, it's quite
essential that I have three systems. How could I be expected to manage with fewer?
...