Even if it performs reasonably, it may still be unmaintainable, meaning that any future changes are likely to introduce bugs and instabilities. At the present state of AI coding it’s completely understandable not wanting to depend on code that the maintainers have no good understanding of. The code auditors would have to become the maintainers.

Any rational person investing in AI rewrites at this scale must fundamentally believe that all the downsides of the slop will eventually be cleaned up by the next version of the slop machine. So it's slop all the way down until, wave wands, the slop is indistinguishable from magic.

That is to say, techno jesus cometh.