I've wondered for a *long* time why coders do not prefer a build-it model to
servicing mass-produced proprietary code.
The profession of coding would be stronger as a profession if coders kept the
source open and sold time to build individuals what they needed. There is
little danger that non-coders will suddenly wean themselves from the need to
hire coders just because the source is available.
Doctors generally don't keep their medical knowledge secret to make money. They
share knowledge and concentrate on practicing.