Hopefully this hitting the news will help a lot.
"Office was completely rewritten in 1992-93."
"it did in the past with Windows/Mac Office 6.0"
Also, the first 32-bit version of Office was actually Office 4.2...
Personally I'd suggest that MS offer both options for the start menu.
I think that adding back the start menu is good enough. You can disable the hot corners and change file associations already in Win8.1.
You are misreading the article.