> stuck to why he thought it was bad for Bun to do this

Quite the opposite. "When Jarred announced the Rust rewrite, we were ecstatic."

> It’s definitionally an ad hominem against Jared.

Who Jarred is, as a CEO, definitely has an impact on how the company develops software - how Zig is used. And the argument is that Zig is used badly in Bun. Without that context, I, as a reader, would have to actually read through a lot of code to be convinced of that point.