How to change the thank you message based on the user's answer?

Can this same setup be applied to a workshop registration form? I would like for people to see a confirmation of what workshops they registered for on the Thank You page.

Yes it is possible. You can add condition in your form to change the thank you message based on the user's answer. Please check the screenshot below on how you can add condition to change thank you message:

Hope this helps.

Do get back to us if you have any questions.