New ask Hacker News story: Ask HN: Have you ever worked hard on something that did not pay off?

Ask HN: Have you ever worked hard on something that did not pay off?
6 by arduinomancer | 0 comments on Hacker News.
Inspired by the recent PG essay on hard work. I feel like there are lots of anecdotes of people working hard and it paying off (e.g. Bill Gates). Have you ever worked hard and put a lot of time into something that ended up being a waste of time/effort?