I must admit, I also prefer mechanical. For me, personally, a regulated APV is kin'a like one of those electric-assist bicycles in a town where everything is always downhill. I totally understand, tho, that other people like to vape other stuff, for their own good reasons.
I had, at one time (before any question of me making a mod came up) thought it would be cool to have a bypassable regulated mod. This tho, was specific to the circumstances of the time, where there was no regulated mod that could pump out more than about 12-20 Watts. And the reason was specifically to go beyond the limitations of the device when desirable. Anymore, power isn't an issue, and so it seems to me that, if a person prefers a chip in their mod, there really wouldn't be a time when switching to mech would add possibilities.
On a practical level, size matters, and I'd hazard a guess to say that I've got pretty much the smallest wood in town.

(that you can squeeze, that is to say).
Making room for a board would be a compromise not worth the payoff, in my mind. Making a separate, plug and play housing for the board would add the size of the board AND the size of the housing. There's other deets too: mech VS regulated wiring and contacts and connections benefit from different infrastructures. I'm sure it could be worked out where both can be accommodated; but I don't think it would be the best of both worlds. Most often, the amount of compromises required for an overly complex or redundant system aren't worth the benefits. Most often, the failure rate increases as well.