What’s your favorite product that failed, and why?

Some of the most innovative ideas and bold designs have come from products that ultimately didn’t make it. Whether it was ahead of its time, misunderstood by the market, or just unlucky, these "failures" often hold lessons, nostalgia, or inspiration for creators. What’s your favorite failed product? Was it a piece of tech, a service, or something else entirely? And what made it memorable or impactful for you? Share your stories! Looking forward to hearing about those hidden gems that deserved more love. 💡