I think a tech demo is in line with this thinking - selling it first doesn't mean there can't be anything of substance. It means you didn't invest a year of you

I think a tech demo is in line with this thinking - selling it first doesn't mean there can't be anything of substance. It means you didn't invest a year of your life taking the tech demo and making a full-blown product out of it before showing it to people. I think many products have substance that people would buy but the execution is way off and it makes it unappealing.