Elm also seemed very promising in the beginning, and honestly I don't even think that comment is so abhorrent on its own. I think Elm died the death of a thousand cuts. If it had only been one errant comment somewhere, it would've been mostly forgotten about by now. Instead, it's Elm that's mostly forgotten about.
So I say best of luck, but also... No thanks for now.
edit: Just so it's completely clear, I am actually implying that "maintainers being dicks" was actually not the problem with Elm. I think people just got especially infuriated by it because they were sick of trying to deal with Elm's constant direction changes, of which this represented one. I remember going through and learning Elm and like literally months later everything was completely different and I no longer knew how to make a basic hello world application. I know that to some degree this is the nature of a 0.x product, but at some point it's like "OK... then who is supposed to even use this?"
Imagine me not using Linux because of Linus being harsh (yet educative) to some people... or not using OpenBSD because of Theo... or not using Common Lisp because of #lisp... :P I have received some hostile feedback personally, but they were in the right. I did not take it to heart but I learned from it.
That said, I have checked the edit history and I cannot see what the fuss is about. Welp. Moving on.
Forget about all of the drama, imagine if you used Linux and it stopped updating at 2.6. Elm has been at 0.19 since 2018, and that's not because there's nothing left to improve on.
Yup, that definitely would be an issue.