Super wierd that Form Submissions cannot be associated with other objects (beyond the original Contact object).
I suspect that Form Submissions are the only activity where this is not possible.
Super annoying because, for example: a Form Submission is the initial trigger for a new Deal, a sales enquiry from a potential new customer. Would be ideal therefore to see the Form Submission in the Activities line for the Deal, so that colleagues can see how the Deal originated.
Many other use cases for association of Form Submissions, especially with Tickets and Companies.