Using tabs for document management (f.e. Browsers, Text-Editors, …) was a mistake. It would be way better if every document (website, text-file, image, console, …) was in its own window, centrally managed by an intelligent window manager of the OS that allows quick and easy search between all documents like with a full-text searchable exposè-like view.
Using tabs for document-management was a bad but necessary workaround because Windows is a horrible window manager (despite its name, ironically).
Tabs work best when there is a fixed amount of them (Like with game settings: Controls, Audio, Video, Gameplay).
I could go on for quite a while on this, but I think this is where I stop.
I just want to continue using my HP Reverb G2, which will be bricked for absolutely no reason due to the deprecation of the Windows Mixed Reality Portal with the end of Windows 10. :-(