This was interesting inside view. One thing that I did notice is the statement that the level of changes on the MSFT side was causing him grief. I'd be curious, as a follow-up, to see if he continues to develop on Linux. It seems like he has generalized the ease of the port into other perceived benefits on Linux (e.g. rate of change, lower need to adapt code) that might not be true in practice, or at least as true as he feels they will be based on the porting experience.

Sounded a little bit like some kind of initial success euphoria bias. Yes, I just made that up. I remember it with Rails too. This isn't a knock on Rails--just using it as an example--but a lot of people had such a blast porting code (me included) that they assumed everything was peaches and cream until they realized that the big, dirty things in web apps like scaling, localization and the impact of poor planning didn't magically disappear.