On-Topic: Anything that good hackers would find interesting. That includes more than hacking and startups. If you had to reduce it to a sentence, the answer might be: anything that gratifies one's intellectual curiosity.

- From The Guidelines

This is very interesting - engineering is tackling problems others have had to tackle before. With anything from drone economy to personal aircraft coming to life in the near future, to new gear being designed, somebody on HN is working on it.

Reading about how other industries have created tight controls, standardization, good documentation is always of some interest.

I will take this any day over the SAAS/VC/AI stuff.