[bluGill]

I have 10s of millions of lines of C++. It cost nearly a billion dollars to write it, starting before Rust existed. Rewriting in rust would cost more (inflation more than eats up any productivity gains - if we were to rewrite we would fix architectural mistakes we now know we made so a of this wouldn't be a straight rewrite slightly increasing costs, but safe rust wouldn't even be possible with some things anyway)

[zozbot234]

Cutting edge AI agents would eat 10 MLOC for breakfast. That's a trivial workload, especially for a rewrite that's not intended to involve any new semantics.

[bluGill]

60% of the effort is testing to ensure it works correctly.

[zozbot234]

AI agents test their code too, that's how they ensure that they've got the right solution at the end of the day. With an existing implementation in C++ the task would be incredibly easy for them.

[bluGill]

You have far too much trust in automated tests.