[iiiggglll]

> focussed on what customers and developers want

I would hardly agree with the modern web being focused on what "customers" want. How many web pages today hijack scrolling, fill the screen with ads that lie on top of the content and don't scroll with the page, and so on? How much bloat is there? How many MB of unnecessary JS frameworks must be downloaded, often on a metered data plan, to support all of that? The web is a horrible mess these days. It may be a rip-roarin' good time for (some) developers, but it's absolutely awful for users.

[grey-area]

Compared to app platforms, I think it is more open and more focussed on readers and devs. The problems you list are annoyances of some websites, not even the majority. For example they don't apply to the site you are currently on not hard limitations.

In contrast iOS forbids other payment systems (see deliberately limited kindle app) and browser engines. Android forces manufacturers to prominently feature lots of google products.