It is potentially uninformed, possibly mistaken, but not disingenuous.
We're supposed to assume best intent.
Accusing someone of being "disingenuous", "horribly uninformed" and "short sighted" for providing an different opinion isn't doing that.
I learned something from the post. I learned that these enhancements are already mostly being codified in the language.
That influenced my opinion on the subject.
I assumed that the 13 lines of code comment was in the context of js, not (for example) a c parser, where it's pretty normal for 13 lines of js to translate to hundreds or potentially thousands of lines of C code.
The post was informative and respectful.
The name-calling response was not.
