Microsoft Office 2008 (excel) on Sierra?

[pdq]

Also running Office 2008 on Sierra successfully. Well, kinda. It's irrationally slow. It will often launch at reboot even if I take steps to prevent that. And quitting involves a prolonged rainbow wheel. But all of these things were true before Sierra.

Google "Office 2008 slow to quit Mac" or "Office 2008 launches at startup Mac". I'd upgrade (it is coming up on 7 years old), but I'm not sure it would improve things.