Can I upgrade Android on my Xoom?
The newest version of Android I can find is CyanogenMod 11. Needless to say it is not getting any updates any time soon, as CyanogenMod is dead and was superseded by LineageOS. There's some guy on the XDA forums trying to build Oreo for it but let's be real for a moment; A Tegra 2 device with 1GB RAM will run Oreo like a 486 old-school PC runs Windows 10.