Save Form - Capture lead without full submission

Hubspot forms now allow multiple page forms. We have created a 5 page form with only the first section required, and the rest to capture ‘nice to have’ data.
However, the lead is missed if they only fill out the first page and drop off at any point in time after.
I would like to either Capture the lead as soon as they enter information on page 1 of the form. This is a standard lead gen need.
Any help or insights appreciated. Appears to be a big issue when searching forums on the internet.