Earlier quoted context omitted.
I don't know how people live with the mental burden and clutter of dozens of tabs of things they'll (if they were honest with themselves) never get around to reading. It's like watching one of those TV shows about hoarding, where people live in a rabbit warren of junk they claim they'll use one day.
Certainly alarming to see. Mine build up, I keep them for a few weeks, bookmark a few, and burn the lot periodically - which suggests I shouldn't have bothered with them in the first place. My bookmarks are dumped in a large pile to be one day sorted out. I have hundreds of them. And rather annoyingly are there now with forgotten context. I can't even access the creation dates on Chrome/ium unless I export and data w…
OTOH, with horizontal tabs, once you’ve reached a certain number of tabs, they all condense into indistinguishable icons, and even before they have, you can easily only see a couple of the tabs entire titles at a time (on a laptop screen).
So even if you don’t manage tens or hundreds of tabs (although many others do), vertical tabs are still useful because they allow you to never have to think about closing a tab, and still have a great experience with the 5-10 tabs you are interested in at any one point of time.