Yes, that reply provides convincing arguments for not merging the Bun fork, as it interferes with Zig's own roadmap for achieving even better results, while continuing to improve the whole language.
...why does it being 2026 make nondeterminism more desirable or reasonable?
It’s a joke because all of the AI systems du jour are non deterministic and people are putting them in important places anyway.
This was probably a joke about a lot of developers delegating coding to LLMs which are usually non-deterministic (which I personally think is less of an issue than LLMs not having specified behavior like programming languages do).