As the creator of one of the larger Zig projects, does this announcement undermine your confidence in Zig at all? Either with the language used or the decision in itself?
Nah
I do think the combo of not using Twitter, not using Discord, and not using GitHub does make it a bit more challenging for Zig to become a mainstream programming language. Twitter being the least important amongst those. Hard to say how much it matters in practice, as things tend to win on their strengths and not on lack of weakness