that is not that easy because there is a network effect.
you can also say: anyone is perfectly free to start their own bitcoin.
I went and re-read the article and thanks again for posting it. I fully agree that most would like to see a sensible compromise in the core implementation.
If XT is an alt-client as he suggests then moving discussion of it to the client section rather than altcoins here on bitcointalk would have made more sense.
While I can see that starting a new subreddit is difficult due to network effects, it may actually be very worthwhile, after all, that is the only way to break free of theymos's control of the discussion of bitcoin, which seems to be his core complaint.