[garply]

PG, what would you do if you already had a profitable, slowly growing product that was based on a mediocre idea, and two new ideas:

  A good idea with low diversification costs
  A great idea with high diversification costs

I say diversification costs, primarily time and focus, instead of switching costs because the first product will still be maintained and grown, not abandoned.

[pg]

Depends on your goals. If you just want to make a good living with the least stress, change nothing. If you're more ambitious, try the great idea.