I have created a simple demo to illustrate the use case of starting with an adaptive form. Then you realize you are not able to complete the form online, so you download a PDF version of the form to be filled in offline mode using Acrobat/Reader
To submit the form, you get back to the Adaptive Form and import the PDF to populate the Adaptive Form with the data from the PDF.
Let me know what you think of this use case. You can try this capability by clicking the link
you need to select the first option and then upload pdf to populate the adaptive form with data from pdf