Forms are such a basic thing for websites and the fact of the matter is the in-house form builder for Webflow is lacking in certain respects. It just doesn't have the same functionality that users can expect from other services (Jotform, Formstack, Formly, Typeform, etc.)
The reality for most projects is you will end up having to purchase a form plugin from one of the major form developer services.
I understand that forms are a specialized service but if you had a form tool which was an equivalent to many of the major names, that would drastically inflate the value of Webflow as a service and users would be willing to pay more for month/year to access it. I know I would.
Please consider it.