Will old Perma-Links still be valid if I change to the new UI

Will old Perma-Links still be valid if I change to the new UI

I read that the new UI, uses a different URL structure. However I have a number of users accessing published perma links to forms (without having to sign in) to enter data, will these old URL's still work if I opt to upgrade ?

Are their any other migration considerations when moving to the new UI.

I've been very happy with the old UI for many years, but maybe the time has come to update !

Thanks

Neil