Speaking as a long-term transhumanist, it's unknown whether or not progress in computing (i.e. Moore's law) will follow the same trend after 5-10 years from now. We are rapidly approaching the limits of conventional silicon-based technologies which have formed the basis of our exponential trend since the 1950's. Kurzweil argues that once we reach this wall, another paradigm will simply take over in the same way ICs replaced transistors which replaced discrete transistors which in turn replaced vacuum tubes but the alternatives that we've got so far seem to be far away from commercialization.
That isn't to say that it will never be achievable. I'm sure it will happen eventually. The very existence of our brain is proof that the barriers won't be insurmountable.
Why would a transhumanist trust technologies others humans make with closed codes and patented inventions to be part of the living fabric of their existence? Have you heard of Deere and their patented farming machines?
https://bitcointalksearch.org/topic/we-cant-let-john-deere-destroy-the-very-idea-of-ownership-1034731
You will become someone else's product eventually if transhumanists don't bet on open sourced future tech-enhanced life widgets, gadgets and services...
Interesting article. I'm all for open source in fact. Cryptocurrencies and security software are open source for a very good reason and I'd expect any enhancement technologies which significantly impact our way of life would follow the same principles as well.