Same idea as with blog posts: it would be awesome to archieve forms.
Why? Because when you use forms, for instance, for webinar applications, the only option to "deactivate" the form is by removing it from the website or by simply deleting it. The last option makes no sense at all when you still want to see submissions and when you want to edit certain parts of the form.
Our customer has a use-case where they want to limit the number of form submissions and then insert a message "event is booked out". Currently, you need a workaround by removing the form, as I mentioned before.
There are other Ideas threads that have hundreds of Upvotes and many, many comments, specifically requesting this feature. If you haven't already, be sure to Upvote these and add your voice there, too!