I'm not saying I think they'll keep going forever, but I really don't think you should hold your breath.
Why? Has there been any trend to indicate they're headed in this direction?
Sure it has been getting a whole lot of very nice features, but ios has been visibly buggy recently to the point where if I don’t reboot my phone atleast once every 5-6 weeks, bugs start appearing constantly,
From glitching of settings app to outright daily crashes of the settings app , to safari acting weirdly, to the home screen’s app drawer vanishing suddenly or the search function vanishing.
Etc, etc.
(I’m on a stable modern ios version)
I do get where the parent comment is coming from. Commodification of technology can only go so far, and Apple is walking down the same path IBM (or even Microsoft, for that matter) did to learn that lesson.