How many users submitted the form vs how many users reached the form's page won't tell you anything about why they left or how long they struggled before submit

How many users submitted the form vs how many users reached the form's page won't tell you anything about why they left or how long they struggled before submitting. A beacon sent for each click on links on the form's page will tell you how many users left for this or that other page, which is very useful to know and optimize by removing the link and/or bringing its contents to the page itself. A beacon sent for each form submission attempt will tell you how many users make mistakes while filling in the form, how good the error messages are, and whether the users tend to fix their input or leave. Bonus points for incrementing an "attempt" hidden field on each submit button click so that you can see how many attempts it takes for all fields to be filled correctly. Tracking what works and what doesn't can drive a lot of UX improvements, for the immediate and measurable benefit of the user.