Unless you need new features, just keep using it. I still use Office 2010 as well as Office 365.
If you want to always have the latest features, subscribe to 365. You can download the applications and they reside on your pc. That is what I do. The cloud-based apps are not the same.
That support expires does not mean that the program stops working.


It is sort of like the "sell by" dates on canned goods. Generally they will be fine for years after that date. They are there to get shelf turnover.