Why is Trump even important in this case (or where this comment came from) I'm not from USA and in my country such pardons are rarely used but from my POV it looks like a president is favoring his family and not trusting the system where he was the chief of for 4 years. It is not like there was a specific case where Hunter Biden was targeted. If I understood correctly it is a blanket statement where he is granted immunity.
In most modern countries it is discussed if granting PMs immunity is a good idea and in USA the president can grant his family immunity.
Main reason would be "why not?" windows is also working great for most common use cases. Actually there is not much difference nowadays between OSes. Another reason would be specific software like Excel. Why would you switch your OS adlnd most of the software you use if you don't gain much from it.
I've a Linux OS for coding, OSX for work and Windows for gaming. There are absolutely no problems with any of them. Windows worked great last 4 years, no virusesor performance issues without anti-virus or tweaking. Linux drivers needed work at the start but now there is no issues, Mac is similar. Only issue is when I try to code with Windows it feels annoying but it is mostly because I'm doing things with CLI where I should have used GUI.