The technology lifecycles haven't lined up. 10-15 years ago there were phenomenal DSLRs coming out, and honestly there weren't any good enough smartphones worth

The technology lifecycles haven't lined up. 10-15 years ago there were phenomenal DSLRs coming out, and honestly there weren't any good enough smartphones worth connecting them to. The iPhone App Store was in its infancy (it's only 14 years old); there weren't / still aren't any good, widespread standards for fast, personal-area-network data transfers of photos. Smartphones didn't have a lot of memory either: the iPhone 4 baseline model in 2010 ran with 4 GB, and the top of the line was 32 GB, with no slots for memory swapping - not something you can sync a lot of photos to at all. I don't think, 10 years ago, camera manufacturers could've adopted a meaningful integration strategy. They could perhaps have entered the fray as Android phone makers and try to solve it, but it would've been a bigger jump than just integrating.