For a political action, the blowback has been several thousand-fold larger than the support. So far I’ve seen the tailwind creator, shopify ceo, reactjs creator, creator of ladybird browser, writer of pragmatic engineer, many prominent people in the rails community, and so many others speak out against this fork.
The letter (more like a resume blacklist) has shown that the Overton window has shifted enough to where people can comfortably and publicly call out obviously dumb nonsense.
I say good luck to em ... as they say in their notes:
"We do not want to restrict DHH's freedom of speech, he can write and say what he likes. However, free speech is not "freedom from the consequences of that speech", and we as a community are completely free not to associate with people who hold views we find abhorrent."
I get it. Basically, "I don't want to associate with assholes". That's not unreasonable.
As for trying to unseat the Rails founder and BDFL, no chance.