About the Security Content of iOS 12.5.6
support.apple.com
support.apple.com
iOS 12.5.6 patches notes indicate this is merely an update to WebKit. The latest Android Webview, which coincidentally also released today, supports way back to Android 6.0. It is half the download size, gets day-1 patches, and doesn’t require a OS level reboot to install.
To further put this into context: the Nexus 5 (2013) still supports the latest web browser security patches. Same as iOS 12.5.6 running on an iPhone 5s (2013). But unlike the iPhone it didn’t forego a year of browser updates to accumulate security vulnerabilities.
I often see apologists claim that supporting old products is SO MUCH WORK and companies can't afford the developer time and money to support them, as if supporting an older device requires several full time people to do nothing but constantly pore over source trees in a never ending loop.
Apple did something similar when they had Airport updates for devices going back to the Airport Express from 2008.
Kudos for not cutting people off after three years, like Google does with Android.
You're comparing a modular OS against one that needs a full update for a browser patch and it's not the same thing.
Lets not mix up Google's marketing with what happens on the field.