Agreed. I bet the author thinks this way solely because Elm is strict rather than lazy. So what? Strict is much, much more simple.
Anyway my metapoint still stands in that tone is a poor way to foster community and collaboration.
This thread should be about the substance of what he says in the talk, not perceived slights to other projects which we're all still free to use.
I love the FP community but if there's one thing everyone on a whole could learn it is that purist beliefs do no good for FP adoption and only help reinforce the "Functional Programmers are condescending" sentiment.