And why exactly is 16 gb required? Google Music allows you to upload up to 20,000 songs for free, stream them through wifi. Or if you need a song or an album for offline play (like the car) you can download it to your device. Google Drive gives you 5 gb of free storage for all your other content, and for as little as $5/month you can get 100 gb of storage (like me).
Any content purchased on the Play Store can either be streamed (video/music content) or installed/removed/and reinstalled at a later date.
In a given day I am in an area which has wi-fi service (work and home) plus every night I return home at which I can remove what I won't use for tomorrow and upload what I will use.
I have never understood the need for massive amounts of storage, say your $50 and buy a 1 terabyte external harddrive for your home computer.