[Fnoord]

Sure, but with sandboxing and technologies such as Firefox Containers, containers in general (such as Docker), and VMs (together with a secure enclave such as utilized in Qubes) it can all be thrown in the trash bin. Its just a matter of time until that's the norm. iOS is already on top of doing sandboxing well.

[hollerith]

Are you claiming that when two apps on iOS use a webview, there are 2 copies of the system library implementing the webview in memory?

If not, why are you appealing to iOS to help make your case?