Comment by jsiepkes

> Or building your own services, presumably?

In case of Android and Google Play services that is never going to work reliably. Your users will experience breakage on a regular interval and you will make yourself wildly unpopular with app developers (since they will be getting the bug reports of the subtle incompatibilities). Probably to a point where they might just block their app from running on your phone.

All this stuff works on paper but it is going to be a constant up hill battle which you will loose in the end because your users will become fed-up with the constant needling of broken stuff and having to wait for you to fix it. It similar to using Wine on Linux. It works _a lot_ of the time but not all the time.

If you want to experience using reverse engineered Google play services, try an Android phone (or emulator) with microG on it [1].

[1] https://microg.org/