This may be more about an idea than a feature, but... what could be huge, would be to create forms using templates + API and to be able to populate some hidden (or not) fields using the API. This way, the url of the form would not contain the data, that could be really really useful for forms used for SaaS services (for authenticated users, as an example).
Moreover, as the data won't be part of the url, that would be more "secure".
Does this idea / feature make sense?
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