It's the convenience, for me anyway - why carry around multiple devices, when one can do the job.

For travel photography, I went from carrying around a Sony full frame, to a Fuji XT3, to hoping by iPhone 19-20 that I can sell all my bodies and lenses and just rely on the iPhone.

The Sony felt like a chore - from carrying around a big camera and lens, through to the editing and photo management. The Fuji was a breath of fresh air - a bit more compact, and the film sims allowed me to cut the editing process out. But there was still lugging around a camera, and then the photo transfer etc.

With mobile phones' improvements in photography, coupled with the endless opportunities for apps, I can't wait to rely on it as my sole camera.