[ta8903]

Not sure if I agree about using windows instead of tabs. I have hundreds of tabs open, and dozens loaded, at any moment. I'm sure that it's possible to manage all the context with separate windows via a window manager, but it would have to be a REALLY good window manager to be able to provide equivalent features of tree style tabs and separate panes and whatever else that something like Sidebery provides, and it is always easier for each application developer to implement tabs suitable for that application's requirements.

[jiehong]

I think one of the point of the author is making might also be that a window manager could do just more, like managing windows as tabs as well.

So that any application could have tabs, if the desktop manager would allow you to group windows as such. Same with showing a split view within such a tab as well.

I think I agree with that. I could imaging that the browser containers of tabs would make a ton of sense if I could make a container of windows handled as tabs across different applications at the window manager level.