[porker]

> Why?

A tangential answer (focusing on backend not language) is because I'm (we're) going to have to reproduce much of the fronted complexity of the business logic on the backend to validate what the frontend sends.

I'm mostly agreeing with you. I've built multiple web-platformed insurance systems and booking systems in the last decade and moved from fully server rendered pages to client rendered forms. The complexity increased with that change but as you highlight once it's done the ability to test different frontend flows is great.

But I'd like a way to share more of the business logic rather than writing it twice.