He mentions stretch goals as the big reality. And that is, "I envisioned stretch goals as developers being stretched over a gigantic rack, screaming and writhing in pain, because the reality is you add new platforms because you really think you can do it, you add new modes because as a creator you're like, man, this is going to be awesome, but at the end, it ends up being an incredibly large amount of content and you end up being stuck in a situation where you can either say, do we cut content, or do we keep our promises and end up knowing that we underestimated how challenging this will be?"