I don't understand the tab hoarder mentality. I can't stand having too many tabs open it makes everyone disorganized and less useful.

My workflow is to open random links and searches in private tabs and then when I'm done with the search I just close the window and they're all gone. I also split subsequt searches up into multiple private windows with a few tabs each so once I find what I need on one search I can close those and have the ones I'm still using ready. If there's something I need to reference later I can move it over to the regular browser window or bookmark it.

Makes it easier to manage and doesn't get out of hand that way.

Yes! Bookmarks are for things I'll need to reference again and again in the coming years. I do keep a tightly-curated bookmark collection, I just don't want it clogged up with a bunch of stuff I can't foresee needing in the long term.

Tabs are for things I'm working on right now and don't need bookmarking for the long term. And, for what it's worth, most of the browser windows are custom-titled, so the windows themselves are a lot like bookmark folders, while the tabs are like temporary bookmarks.

Plus, the ability to search through tabs by hitting Ctrl+Shift+A means that it ends up being faster to search through my tabs than my bookmarks, without using the mouse. ex: Ctrl+Shift+A, Type needed page, up/down arrows if needed, then hit enter to move to the tab. With Ctrl+Shift+O, you don't get the same ease of scrolling the results without tabbing through a bunch of junk first.

There are other reasons, including neurological ones surely, but those are my primary justifications.