Oh, thank you both for your quick responses. So he really did a good job to solve the pains of his potential customers. Now the question becomes: how WP got so many consultants in the first place? But that's out of the scope of the parent posting, it still within the scope of the OP though, :)

Based on my experience, it's very hard for people to accept something new in the first place, for example, when WP was introduced. And this is still happening now. Once a group of people accept a new concept, building on top of it to improve the system is a little easier.