I think there are, see the other comment about tree-style tabs or similar for Firefox. I can absolutely see the value in that and I don't argue for that option to be removed or otherwise degraded.

But that's not the point. I'm not against applications offering those possibilities, and when I have to use Windows for work, I'm happy browsers have them.

My point is that they shouldn't force users into this way of working. Browsers already support multiple windows. Why can't I just disable the whole tab feature if I don't care for it? A while ago, when tabs were still new, you had to actively opt in. The default was a new window for everything. Now this option is completely gone for some reason.