The inevitability of the Singularity, and most of the rest of the baggage train that comes with Kurzweilanism reads more like a religious conviction, and less like a scientific certainty.

There are enormous gaps in reasoning that you just have to gloss over to go from the current state of the world to a post-singularity one, that you are expected to accept, on faith.

I personally think it's about as likely as the return of the Messiah in our lifetimes. That is to say, it is not.