>>odo124+Ep
This ship has sailed, in the past Amazon's store did not succeed a lot, but there are already a few important enough offsprings:
* Huawei with separate store and no Gapps
* Samsung with importantly different browser and ton of extra features, also another store
* in China the app-in-wechat and similar are a major thing
If you develop for a diverse set of user you need a lot of effort.