[soulbadguy]

This is such a core idea that as you find it really surprising how much it gets overlooked.

IMO, another important aspect of rewrite is that it's usually pretty easy to get 70% of the functionality for 40 % of the work. But as one approaches 100% feature parity , plus handling all the corner cases, the transition from prototype to production ready things equalize pretty fast.

Not to mentioned the unknown unknown that the new language might also bring.