How much longer can an iPad Air 2 be used?

I have an iPad Air 2 that is Wi-Fi & data-capable with 64gb. How much longer will I be able to use it and what is the most current update that it can be upgraded to? There is nothing wrong with it & is in pristine condition. I’m trying to decide whether to sell it, use it as a home hub, or use it as a paperweight, lol… I’d appreciate any advice on this matter.

Thanks in advance!