New top story on Hacker News: Ask HN: Which great products didn't succeed?

Ask HN: Which great products didn't succeed?
102 by mrborgen | 284 comments on Hacker News.
I've often heard the claim that the startup graveyard is full of great products that didn't succeed (e.g. because the startup wasn't good enough on marketing, or because they didn't solve a big enough problem). What are some examples of this? If there are examples of truly great products that eventually died, I'd like to study them more in-depth.