What is the proposed idea/solution?

Add the ability to insert a Condition (like in Rules > Visibility) on the Submit button of a form. Possibly even run an automation to check values in other tables before Submitting a form.

How does is solve the user problems?

A dynamic Form Limiter prevents unwanted Submissions that a Collaborator won't have to clean up later.

Who is the target audience?

Airtable is a significant step up from Survey Monkey, but there, I'm able to limit the number of form submissions.