Ok, but this is just a case of some apps not implementing this properly.
For example Adobe Acrobat does remember exact position in the document, so do first party Apple apps and many others.
Some apps don't.
On Linux no app CAN implement this because the protocols do not exist.
> so do first party Apple apps
Again, what I've started with - this is simply false. App Store, the first party gateway to all apps, doesn't. It loses the app page you're in all the time and can't even remember your search query. Safari doesn't
> On Linux no app CAN implement this because the protocols do not exist.
What do you mean, what stops an app from saving position and restoring it in the absence of some magical protocol? How have some apps done in since before the phones existed?