VideoLAN @videolan App Stores were a mistake. Currently, we cannot update VLC on Windows Store, and we cannot update VLC on Android Play Store, without reducing security or dropping a lot of users… For now, iOS App Store still allows us to ship for iOS9, but until when?
Fdroid has no say in what repos are added by the users.
Theoretically yes, but in practice for the vast majority of users it makes no difference. Very few people are going to go through the trouble of vetting another source, adding it, etc. That’s what the tyranny of the default is all about.