"back to top" is just such an epitome of how out of touch some modern design is. We had buttons on our keyboards that did this for half a century now. As for phones it should be up to the web-browser to implement it, nobody wants to use your idea of how scrolling should work. My machine already knows how I want to browse my content, don't pretend you know better.
> out of touch This is ironic. The vast majority of users don't know about most of these functions. They just use their mouse. Even for basic things like: - navigating & selecting text (words, lines etc.) - switching between windows - opening search (like spotlight, if they use it at all...) - opening & closing windows/tabs, saving files etc. The list goes on. UI design is not about teaching you how to use a computer…
Maybe we should be pushing browsers to have better UX on-boarding and teaching people that home button will scroll you up to the top of the page etc.