Sure. So? If you want a new desktop every year, just buy a Dell or Acer.
Yup. Also, if you want a new desktop every two years, just buy a Dell or Acer.
Also, if you want a new desktop every three years, just buy a Dell or Acer. (The 2014 Mini wasn't really an "upgrade".)
Also, if you want a new desktop every four years, just buy a Dell or Acer. (The 2013 Pro still doesn't appear to have an upgrade in the works.)
Also, if you want a new desktop every five years, just buy a Dell or Acer. (Will the 2012 Mini be the last good Mini ever made?)
I guess, if you want a crippled, non-upgradable, overpriced AIO machine, you can get a Mac that fits that description which is less than five years old. But, that's about it.