[selfhoster11]

That's not all that a smartphone is, but it is most of what a smartphone is.

Most applications basically just need:

- a canvas to paint some bitmaps on

- some way to tell what part of the screen the user tapped on

- a way to get TCP/IP or HTTPS traffic in and out - some sound output

- some persistence

- some way to show notifications

- a few other odds and ends like GPS, sometimes

Almost the entire list been supported on every major platform since the late 2000s. Yes, rich multimedia apps that make good use of additional APIs and hardware features do exist. But it's inappropriate to nuke most old "normal" applications just because old rich multimedia apps stopped working over time.

[newtritious]

You seem not to think the features operating system itself provides are part of a smartphone.