The chart clearly shows that there is a lot of proliferation, which is confusing to a lot of new users. Imagine what would be possible if all these fine developers would focus on two or three distributions. Ps. I am proud that I was a paid co-developer of the very first distribution listed ;).
Well, for any of us old enough, this is the revival of UNIX wars.
I know it's cool to be all blase about this, but this is different.