I'm still getting updates to 2011...got one today, so they haven't stopped supporting it just yet, but since it's 32 bit, it will run only through macOS 10.14 (the next version, which is due out in the fall), but maybe not with full functionality, and it absolutely will NOT run in macOS 10.15.

I use only Excel, and plan to switch to Apple's Numbers, which looks like it won't be a problem for me once I get over the GUI shock; I'll lose available functionality, but none that's necessary.

I haven't investigated 2016, but I expect that it's 64 bit and will run after 2011 has become a dead issue.

The new Great Equalizer is the SEND button.

In Memory of Harv: Those who can make you believe absurdities can make you commit atrocities. ~Voltaire