What does the future of something like F-Droid look like once Google does their lock down next year?
Alternative app stores are mandated atleast here in the EU I believe?
It seems google is going to allow an "advanced flow" that is scam resistant by requiring the user to wait 24 hours before they can start installing their own apps. It sucks, but assuming they don't change the plan again, F-Droid should be able to continue working.
Updates on this have been slowly trickling out and the best I can discern is you will be able to still install apps from stores like F-Droid, but you have to go through a manual "advanced flow" which will most likely make you wait 24 hours before installing it and make you go through other hoops.
In short, google has referred to this as "increased user friction" to try and deter people from doing this. Essentially not making it impossible; just really frustrating for users so they get sick of the process and just install verified apps through them.
The only way I know around this is to install a custom rom like GrapheneOS or Lineage OS since this change targets Because the policy targets the Google Mobile Services (GMS) framework rather than the foundational Android Open Source Project (AOSP).
Isn't it possible, however complicated, for users to undo the lockdown to install an app? The required 9 steps are noted at https://keepandroidopen.org/ for devices that use Google Play Services.
Irrespective, people should probably be migrating to a GrapheneOS or similar OS asap once the OS ships with a device.
Since F-Droid (i.e., the repositories, not the app) builds all apps, a practical solution would be for the repositories (i.e., their signing keys) to be recognized by El Goog. Whether and how much help / obstacle the "maybe we do evil" company puts up for / against this is a different question.