I dont know if the reasoning for a rewrite is purely for maintainability though. Ive used python at scale and its fine if you have reasonably good code hygiene. The reason I'd want to rewrite in any of those languages is they're significantly faster _and_ are maintainable at scale.
> Ive used python at scale and its fine if you have reasonably good code hygiene.
True but that's the problem. Once you have a big enough team, it becomes an uphill battle to maintain that.