Several years ago, my company delivered a computer system to a customer that consists of Linux servers and Windows 7 workstations that we still have to maintain. My company laptop just got updated to Windows 11 and my personal laptop is running Windows 10. My phone and tablet are Android, while some of my relatives run Apple IOS on their iPhone or iPad (and they sometimes ask me for help in how to do something).
It's a struggle to keep it clear how to use each operating system, since there are many key differences. The user interfaces are different, and it's especially difficult when troubleshooting and/or updates are needed.
Do you have to deal with multiple operating systems? If so, how do you handle them all?