Hey Sylvia,
In the end for earbuds we are basically talking about batteries and the possibility to replace them. The rest (PCB and Speakers) would go together with some sort of housing as we have for some phone modules. So at the moment, the main battery of the charging case is not replaceable easily so we will be soon offering the charging case and the earbuds as separated parts available. Of course, our repair center remains available for repair for anything that occurs within the 2-year warranty!
And for the future, as always and as we did with Fairphone 1, we keep developing and improving 