I didn't intend to imply anything beyond that.

Fair enough. On re-reading your post, this is obvious.

One reason that I may have seemed short is this: people often say things like: "Oh, just add some hooks", "Oh, just make it multithreaded", "Oh, just do X", without any clear understanding of just how much work that entails.

I'm sure we've all worked for a PHB that's said this at one point or another.

Now, I don't mean to imply that you meant it in this vein, but I just wanted to point out (to other people) that it ain't that easy.