This is why we need presets
Isn't that--more or less--what the IR collection is?
IDK....I've never felt buried in choice for IRs. There are enough, but not "too many". I skimmed through what was available on the cab models list on the wiki, narrowed it down to some I was interested in based largely on either preconceptions or experience with real cabs, A/B'd some using a switch in a sports bracket style, made the choice, and tweaked details. It never seemed all that hard to me.
There is certainly a question of whether or not I'm using the absolute best possible IR ... but, if I wasn't happy, I'd keep looking. And, it's still easier to pick out IRs than it is to pick out a real cab.
At least for me, it also helps that I only use one kitchen sink preset. I never wanted a different rig for different songs. That preset is on like version 50-something (I reset the numbering each time I do a major firmware update), but it's based on the same idea as the first time I went "yeah, this is it" from the first week or so I had it.
ETA: I guess there is a little nagging feeling in the back of my mind because
so many people talk about really liking specific microphones. And as much as I know and accept that they're responsible for a lot of the sound...it just doesn't bother me as long as I'm using IRs. A lot of the YT guys (and my experiences in actual studios with huge mic lockers) lead me to believe that maybe I'd prefer a blend of different mics on the cab and probably would experiment with other setups on a real cab (assuming I could afford said cabs and mics)...being limited to what's sitting there in the cabs list feels refreshing.
Plus, and this may be a coincidence, almost all of the IRs that I actually end up using are just an sm57. If I were actually micing a real cabinet and only owned an sm57....I'd feel FOMO. Youtube and memories of micing cabs at my internship would have me GASing for other mics...that I know I'd never actually spend the money on. I recently decided to go back to a mono cab and blend in a room mic. And that room IR was captured with a U67. Whether it was the tube "collectors edition" or the "affordable" version, that's more than I'd ever choose to spend on a mic.
All that applies to the DynaCabs too. But, at some point, you have to just "let go" and use what you got. And I'm perfectly willing to let "the pros" mic up the cab for me.