Often times it's a matter of just listening to customers. Even if you don't have a knack for the domain, if you get enough feedback and react to it, you can "or

Often times it's a matter of just listening to customers. Even if you don't have a knack for the domain, if you get enough feedback and react to it, you can "organically" fit it well. It's sort of comparable to a genetic algorithm. Of course, having a knack for a domain could mean fewer iterations of rework. Lisp is ideal for changing on a dime, at least for a small team.