

I presume the concern is governments banning apps left and right so a federated repository will be mostly immune from that. But you are right, technologically is not as straight forward.
What surprised me is that F-Droid is avoided by many FOSS enthusiasts (due to signing it themselves so delayed updates and potential tampering). Aurora is great but 100% on Google’s merci and Google frequently cuts its winds. Did not know Aptoide was community based… have to check it out.
That is very hard to asses. I prefer to look it like this, what chances is that you will find a partner (like for marry to) out of 100 or so. I do believe, if given equal chance of interaction, you could find a marrying-material partner every 7 or 8 people. Now, in a world of plenty of choices, biases etc, we shuffle through hundreds of people before settling with one… and, even then, still unhappy with the choice for the people we haven gone through yet in our search. Now, that is for me… Chances is you would choose a different person out of these very same 7 to 8 people. Both chosen persons have the same chance of being equally good persons, as the non chosen ones.