Considering this new one has Android on it, your point about not needing security updates doesn't hold. If Sony is as aggressive as Google is, three years you'll have a malware magnet in addition to your smart phone.
If you're legally buying music, not there.
All the apps for mauic playback, streaming, etc. come from the Google Play Store, and there are very few that someone who buys one of these would need anyway.
I'd venture many of these will spend most of their existence with wi-fi turned off, as it's a battery hog.
