The 2 days were spent uploading my entire library from scratch. After that, daily syncs only take a few minutes.

I don’t think this should be framed as iOS vs Android. From a technical perspective, I understand why the behavior differs. But from a user’s perspective, all they see is that one app works much better than the other.

My family doesn’t care about the technical reasons. They just saw one app finish much sooner than the other, and they preferred the one that worked better. Based on that experience, I can’t recommend Immich to them.