I currently have Microsoft Office 2010 Educational, with all the major programs including Publisher and Outlook.
I am contemplating upgrading to Office 2016, as I definitely want an installable version, not a subscription version.
I have no idea if it is possible to have two versions of Office installed on the same machine at the same time because I've never tried it and, I will admit, it's not something that would typically be done. I just thought if it can be done it allows me to jump back to the familiar for a while if I need to do so for certain things.
If anyone can confirm that they have done this, or confirm that it cannot be done, I would appreciate it.