First of its kind

The Segway was supposed to be revolutionary, but today's self-balancing scooters outsell the original Segway by miles.

Google Glass was less desirable than the Apple Vision Pro is today. The idea of having cameras on your face was taboo, 10 years later it's acceptable.

Mobile phones were around since the 70s but they weren't in everyone's pocket for another 30 years.

A design can be good in theory but not well executed. Or it's just that the time was wrong. That's why creating the first of something is so difficult. The public's interest is harder to gauge. A first-of-its-kind product might be successful, but it's safer to come in second.