So far, my experience with people above 60 is that they quickly understand how to find and navigate between the apps they use every day. The ones coming from Windows adapt suprisingly fast, and are very pleased that the fullscreen popups and forced updates are gone. Shortly before I moved them over to Fedora, they started developing a fear of using the computer because they never knew when it would 'lock them out' because the screen was filled with a fullscreen Office365 ad that had no obvious exit button.