>But I think about all of it. nginx, haproxy, redis, postgresql, nodejs, python. I don't think I could even write out all of the open source I am using in my projects within the confines of a Hacker News comment. Just trying to wrap my head around how I could even pay for all of that software if I had to is anxiety inducing.

Luckily, the licenses of these projects are all such that, the minute the maintainer pulls the rug out, you are perfectly free to fork the project and move on as if nothing happened. Open source protects you.