I think youre missing the point of ditching MS. As long as you are still
tied to all of its apps - you arent ditching anything.

Notepad is just a text editor. Use gedit.
I havent come across anything in MSO that OO cant do.
There are a few apps that I couldnt find matches for so I created them
myself.

WINE - like the real thing - should be used sparingly.