And none of those products have nearly the sales of a smartphone to sustain R&D. Similar to how the headphone dongle of an iPhone is much cheaper and yet better quality than most audiophile equipment.
For example, I really like live or motion photos.
Or handheld HDR stacking but they're more able to deal with that.
Also, are you saying you could reproduce any of the on-phone stuff easily on your computer? I’m thinking about the astrophotography modes, portrait modes, live photos, and low light features.