[anovikov]

Especially when one's main source of income in custom development, and in custom development you are motivated to be a perfectionist and develop a skill of explaining a client how even small defects are unacceptable - because otherwise, you'll never milk enough billable hours out of the limited market in front of you.

[libridev]

Custom development (contracting) your already guarantee the sale since they are paying you for what you already want so in that case I guess you could perfect your craft. On the open market there is the trade off of no wanting to waste your time on what people don't already need. In the case of the windows app you had validated your idea so at that point polishing it wouldn't have been that bad of an investment.

I guess the hardest part about these stories is as they say "hindsight is 20/20"