FYI in case you aren't aware, the rewrite was shipped, and then had to be reverted due to issues being discovered. That's "Jarred's high quality bar" you're so confident in.
I hate to be pedantic but for a whole host of environmental reasons, they are suboptimal, and it still incinerates money to lose a rocket during a flight test.
In case you aren't aware, the whole codebase of Bun did not explode into debris just because it hit a bug. They can just fix the bug and recompile.