Beware of building a business around an obvious missing feature to an existing product. Especially if said product has an active team that's constantly churnin

Beware of building a business around an obvious missing feature to an existing product. Especially if said product has an active team that's constantly churning out new features, and even goes as far as to have a "labs" section. So yeah, if you did this for Outlook instead, you might have a viable business. For Gmail, you run a very real risk that your feature may simply appear for free inside of Gmail itself one day, leaving you out in the cold.