I'm on my second. I'm still using the latter. You are not looking at performance or prductivity at all. I've kept this OS installation for at least three years. There is no common hardware, other than the keyboard.
Efficiency is in the eye of the beholder.
I use FrameMaker for all documents, including presentations. Sure, I use Excel for spreadsheets where they're appropriate. I can't be bothered with pretty. If mamagement wants the facts, fine. Comments and Bug Reports are welcome.