I haven’t seen anyone who knows trying to discount Alan’s (and his wife’s, of course) contribution.
Even so, the fact its that once it was up and running and viable, Alan had neither the skill set for, nor any interest in, taking it to the next level, that is, multiple locations replicating the original experience, as he himself would be the first to tell you.
Hence the (100% amicable) buyout of his interest.
Yes, Alan founded the original restaurant.
But it’s also true that the Alleycat’s model, with which most people are familiar, was created by Mark and his original management team.