There's nothing forcing you to adopt their whole ecosystem, even if your core functionality is using G. Move away from their client based products though: Chro

There's nothing forcing you to adopt their whole ecosystem, even if your core functionality is using G. Move away from their client based products though: Chrome-> FireFox, Gmail app->any other, Maps->Bing/OpenStreetMap. (Personally I still use maps, because the others aren't quite quite up to par in my region).