Well if you read through the article he notes how what bun devs say is inconsistent. One one hand they complain about being verbose, on the other they say all their code is LLM written. The LLM is apparently really great at translating huge amounts of code, but can't keep track of memory allocations. They present the whole thing as a pure win rather than honestly explaining trade offs such as compile times. They never talk about how they arrived at decisions or what options they evaluated. I think the article is absolutely correct that this is a PR stunt by Anthropic. Rust might be a better choice than Zig, but it's pretty clear the decision was driven by marketing here.