Great blogpost and congrats to OP on the success.

As someone who, in a past life, also sold apps on the Mac App Store (with some success), I could never escape the sense of insecurity, whether it be Apple "breaking" (or fixing?) things every WWDC, constant pursuit of the next idea, or potential competition. Not to mention, the fact that sometimes reviews seemed oddly personal and the occasional rude customer support emails could ruin a day. (This all probably says more about my own mental psyche than anything and I'm glad some people thrive in it.)

In the end, I felt more comfortable doing the 9-5 engineering job, but it was definitely worth it and really taught me to be self-sufficient and exploratory in software development.