I've personally believe that the biggest change operating systems should have is to prompt you for the kind of workflow you want to do and give you sane defaults for that (software developer, graphic artist, video editor, etc etc). These workflows could even be sourced from the community & customized at an individual level so that you could point it at someone's published workflow or fork it for your own purposes & have everything set up for you regardless of which machine you move to. This would go beyond settings to setting up your environment & installing programs where you like it (e.g. installing homebrew + relevant packages, etc). You could even have it per user for those that have multiple different workflows.