> But if they're not already using the product out there with the most X, you shouldn't believe them. Maybe if they're not using it, it's because they value Y,

> But if they're not already using the product out there with the most X, you shouldn't believe them. Maybe if they're not using it, it's because they value Y, Z, and etc. more, and the product they're using has Y, Z, and etc. The market opportunity can still exist, but the more features you add, the more niche your product is likely to be. Also, hopefully you have some substantial competitive advantage on X. If you don't, then your competitors might just add X to their product, or a variant thereof, and you're gonna have a bad time.