HI, I am with UT since 2015/16 and we have discussed this topic a lot. The main blockers are:
- aGPS solely relying on cell tower coordinates is feasable for a certain range of devices, but not all of them. Its a feature deeply buried in the firmware of the phone and exposed via Android blobs where we have not much influence if it really works or not
- aGPS via WLAN AP names which is used by Android a lot is a simple matter of cost: There are no free databases and so we would need to charge for that in some way (or, maybe we could allow inserting your own token somehow, and you pay for yourself). But technically challenging.
We often take stuff on Android and iOS to be free for granted, but keep in mind that their cloud services require a lot of money to be operated on dedicated hardware and utilizing databases of other 3rd parties, and this is simply too much of a burden for a small OS project.
The same BTW goes for maps and navigation, though we got this currently nicely covered.