As far as proffessional equipment goes, we're there... I have an 8 core workstation with 8gb of ram and 2 24" monitors running linux with a window manager heavily customized by me.
This kind of reasoning makes the same presupposition as the article's author. But it is ironic that he mentions musicians--a professional musician's tools, like a programmer's are basically high quality versions of the amateur's.
The conjecture about keyboards being suboptimal is verifibly true, but that does not automatically extend to the machine as well. I also suspect coding experiences will be pretty subjective.
1. The amateurs tools are a low quality, oversimplified version of the professional's. The same goes if you compare a Korg Trinity to a cheap Casio keyboard (I've owned the earlier of the two for 16 years and play for 2 hours a day at random intervals if that's any help supporting the difference in quality).
2. The machine is definitely suboptimal. I suggest that you read the remainder of the author's blog about sane computing.
However, 99% of that equipment is a black box designed for the lowest grade user which is the very apt point of the article.
You are not a professional - you are a salt mine worker as am I.