I disagree it's a political stance, this reads like a technical decision to me. In my opinion, there is no vibe-coded project that's going to be reliable long term. Eventually there's too much code, too many bugs and the whole things slows to a halt. Or it gets too expensive to continue to be vibe-coded, because token cost.
If they had decided to drop Bun for "AI assisted coding," that might strike me as a political decision.