Before the days of the web, we had a solution for this that was better and easier for users and didn't invade privacy: UI design guidelines and UI consistency.

Before the days of the web, we had a solution for this that was better and easier for users and didn't invade privacy: UI design guidelines and UI consistency. Apple is the only company that still occasionally does this, though even they have driven off into the realm of every application having its own entirely novel interface. Go back in time to MacOS or Windows in the 1990s and you'll find an entirely different paradigm: every application has the same interface... or at least the same interface paradigms. Learn the computer once and you've learned the computer. Features were remarkably discoverable. They were organized logically in menus. Keyboard shortcuts were always available and usually intuitive. I remember opening a new app I'd never used before on Windows 95 and just unthinkingly hitting a keyboard combo and it doing the general thing I expected, or mousing to where I expected to find a feature I imagined should be there only to find that it actually was there. I never used Mac Classic much but I heard it was similar. The web is what really broke this. Web UIs overtook desktop UIs due to the difficulty of installing local software and the power of trendiness. Web UIs were never uniform and couldn't be since the web was anarchistic and wild and often driven by designers who wanted to make their product look a specific distinct way. I remember in the days immediately before the web there being talk of algorithmic generation of UIs from data schema. If the UI is thoroughly standardized then it becomes at least thinkable to examine data structures and generate user interfaces from them, even UIs that aren't horribly ugly or hard to use. This was building on a previous generation of incredible WYSIWYG UI design tools. Then the web came and all that stuff was completely abandoned. Today's UI design tools in things like Xcode and Android Studio are horrible by comparison to what people were using in 1995. Go back and try Visual Basic on Windows 95. The VB language sucked but the UI designer was aeons ahead of anything we use today.