I'm going to assume you're not doing this maliciously, as not all of those features and infos are easily discoverable so here are a few infos you might be interested in:
- You always could type in the adressbar by typing Ctrl+L, which is the same shortcuts as all the Browser that I ever tested and most file manager as far as I know. In addition to that, in Gnome 46, you will be able to click the adressbar to type in it (someone had to create the widget for that and until now, nobody had the time/motivation)
- On any Gnome app, you can drag from any part of the headerbar, even on buttons or on the adressbar, you just need to click and hold anywhere. This is actually the best solution that I have seen anywhere in the desktop world: It doesn't need a titlebar wasting vertical space across the entire width of the app and you avoid the situation where the app window is to small and isn't dragable at all.
- Far as I know, classic mode isn't officially part of Gnome and is instead a package that some Distros add that consist of a few extensions. But if you're going to use extensions for an app menu, you might as well use the far better Arc menu which as a lot more options and is well supported (it's already ready for Gnome 46 which isn't out yet)
- Having / as a default shortcut isn't a good idea for an average user, given that most of the stuff you access from there shouldn't be touched if you don't know what you're doing. And if you do, adding the Bookmark takes a few seconds. (If you want to do it super fast Ctrl+L > / > Enter > Ctrl+D). In addition to that, an editable Sidebar is in the works is in the works, although just like anything, someone will have to do the work and write and maintain the code.
As for the statement "I’m not on mobile, this is a desktop", I'm not sure what you mean. You do know that you can use just start typing in the overview to search for an app, file, settings, etc (what appears in the search can be edited in the settings)? Maybe I missunderstand what you mean, but I don't see how the overview is in anyway something from "mobile". In my opinion, the overview where you can manage your workspaces , open apps and quickly search and open new app, is the best thing Gnome made and is the reason why I and many other use it on Desktop. And if that is not for you, you can recreate a traditional desktop with extensions (Dash to Panel and Arc menu for example) or use KDE or Cinnamon, which are both amazing in their own right and perfected the traditional desktop.
To be honest, this seems to me like a pretty bad take with weird and kind of BS arguments. Why are professional designer, both those working for some of the biggest tech companies and those working in open source project, making these choices? It couldn't be for actual reasons or because they actually prefer it like that. No, they are "afraid of color". Or implying that dark theme exist because of these black on white themes, as a mean to escape it. It just weird backwards logic to justify his taste and shouldn't be necessary to just state that he prefer a different kind of themes.
To me, the Windows themes he showed as positive examples look way to cluttered and busy, even though they don't show this much information. I don't need the theme to be "exiting", I need them to display the information in an easily readable way. And dark theme aren't there just for people who dislike the modern light theme. Having a light and a dark theme (and ideally having the app follow your system preference) actually serves a purpose. You can actively switch between them depending on the context, the time of day, the brightness of the room or any other reason to make the screen easily readable and comfortable to look at.