Aftermarket Radio for 16 Mazda 6

[AngieD700]

I have an opportunity to get a new 2016 6, but from what i understand, the factory radio cannot be upgraded with an aftermarket radio. This may be a deal breaker for me since i just purchased a killer Pioneer for my current 2015. Not even sure if the upgrade to a 2016 has other features to make the change worth it. I appreciate any advice/help/info