Truth is, the grind (especially in the early days) is incredibly difficult and soul wearing. This article does a good job of articulating that.
Even though the project is basically dead now, those few months of absolutely intense grind were very formative. I had always had the "business-y" co-founder before, and this was my first solo flight so to speak. It was SO MUCH WORK, but it was absolutely awesome getting interviewed by PCGamer, or Polygon, or having hardware manufacturers reach out for meetings, or being asked to speak at conferences.
Don't get me wrong, I love my day job as a typical run-of-the-mill engineer, but I'll always be addicted to that kind of start-up high :)
 I can't emphasize this enough!