I'm visiting my parents for the holidays and convinced them to let me switch them to Linux.
They use their computer for the typical basic stuff; email, YouTube, Word, Facebook, and occasionally printing/scanning.
I promised my mom that everything would look the same and work the same. I used Linux Mint and customized the theme to look like Windows 10. I even replaced the Mint "Start" button with the Windows logo.
So far they like it and everything runs great. Plus it's snappier now that Windows isn't hogging all the system resources.
UI/UX 101, my friend.
If people are used to see specific symbols for years is hard for them to use different ones.
There's a reason why floppy disk is still the icon for "save".
Imagine if they change all road signs designs suddenly before you go for a ride.