[177tcca]

Holy hell, the FUD.

YES THEY WILL — I wouldn't even say it's "many" or "some", anymore.

"Most" is just insulting.

[ForHackernews]

You believe less than 51% of commercial Android apps on the app store use even one single Google Play Service? No push alerts, maps, ads, etc.

[177tcca]

There are varying (read: dropping weekly) levels of dev reliance on Google/GCM etc for those things in apps, now.

I'd evaluate what you're using, because it's likely to work just fine.