I suspect there are three large subsets of readers, where the process described for "their" language is familiar, and those for the other two languages sound like tales of "inside baseball."
I am familiar with the progress and arguments related to python2/3. I am aware, from a distance, of similar issues with perl5/6 and php5/6/7.
It occurs to me that I haven't heard about similar breaking shifts for other currently active languages, including C and C++. I'm dimly aware that Java recently moved to 8(?) and 9(?) is starting(?). And I wonder about Fortran, which I'm dimly aware still has active users and some standards process.
Can anyone who is familiar with these languages' progress characterize them as breaking and angst-ridden, or smooth and relatively trouble free, and say why? What's different about the process and community from the three languages in the article?
For a possible initial point of contrast, my impression of the three languages' changes are that they are all but new languages that are easy to read for anyone familiar with previous versions.