Forgive me for saying this.....but it would seem to me that the single programmer and modeler got AH THIS far, in fact I would be so bold as to say that the small, tightnit team is one of the reasons it has been so successfull, one of the major reasons.
The size of the customer base has nothing whatsoever to do with it really, it doesnt matter if two people fly it or two thousand...each part of AH, each new plane, feature or whatever, takes the same amount of time to develop regardless.
All the size of the customer base influences is HTC's income figures.
More developers, programmer's artists etc just means more chiefs for the indians so to speak, hence more differing opinions, hence a SLOWER development cycle.
If something aint broken, why try to fix it?
IMHO, HTC are doing a fantastic job, and they have been for years, why would you want them to change the way they go about it?
Blue