Might be cultural differences but, to me...

> Kinda wish the author would attempt to collaborate rather than write stuff like this [...] but, whatever, it’s their blog so they can do what they want.

...feels like passive aggression. In particular the "stuff like this" (like what?) and "but, whatever" felt very unnecessary and the whole "I wish he'd collaborate on my terms" is IMO uncalled for.

Yeah, I could see it being better without that portion of the final sentence. At the same time, I think opening "What a terrible way to take constructive feedback" is at least equally as grating a way to engage about it - but at the end of the day we're all humans, not saints, and it seems clear to me both comments are well intentioned and decently put as a whole. Same as me, I'm sure if I look back at these comments in 3 days there will be parts I would have changed, but overall I'd probably thing they were decent instead of terrible.

I'm glad you made the note about that part though, I agree with it and we can always do better.

Meh, I have the impression the blog author really hates Zig's new Writer (fair, I disagree, but fair), but his criticism in this example is in my eyes slightly questionable -- it is a bug in the implementation and not a conceptual issue. He then uses quite some loaded phrasing like "I must be too dumb to understand this" and "I can't be really too dumb can I?" which I think ruin the discussion (as do the titles. He failed to convince me, for instance, that the new Writer was inherently unsafe by design). It feels like a "Look I told you!!! You run into bugs like this!!!" which is not helpful for a feature/refactor that was already advertised as complex and not fully implemented or verified.

Disclaimer: I'm a zig fanboy and do all my hobby stuff in it