Pebble was an early smartwatch company that launched with a successful Kickstarter back in 2012, with a focus on providing a customizable wearable front-end for apps that ran on your phone. They had pretty good success for the first few years, but then started running into cash problems, and eventually ran out of money and sold what was left to Fitbit in 2016. Now ten years after the initial Kickstarter, founder Eric Migicovsky has published a post-mortem on why it Pebble failed.
The underlying problem was that we shifted from making something we knew people wanted, to making an ill-defined product that we hoped people wanted.
Take a look at the whole post.