Whenever I'm researching or buying something, having tabs ordered in the parent/child tree makes finding things and going back to listings or indexes much easier and the general experience much more pleasant.
I heard a theory somewhere that the reason people use their smartphones for everything nowadays is because they never used the potential of their laptops/desktops and don't see much difference in usability. Things like TST show you how much more efficient you can be on a real computer.
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 wrangle.
I have decided I'm just going to write a system where I paste the address/or use a bookmarklet, and insist on small text or context and/or the ability to tag and group. But it must be a simple and cross-browser/system.
The most annoying thing about bookmark managers is presentation.
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.
That's Firefox, and while I've got plenty of extensions, none are affecting my tab behaviour.
Some people seem to strongly prefer Chrome's behavior. The only advantage I can see is that it forcibly prevents your tab count from getting out of hand.
OneTab works similar to bookmarks but preserves the date & time they were added. It’s even possible to add a title, i.e. context, to a group of links along with the timestamp. Links can be moved around with drag and drop.
A great improvement to OneTab would be to be TST aware and maintain the tree structure.
Pocket makes reading bookmarks a lot more pleasant and the tagging system helps to preserve some context.
 https://addons.mozilla.org/en-GB/firefox/addon/onetab/ (also available for Chrome)
I use Firefox's tag feature for this, helps you give a one or two or three word context like: linux, firewall, iptables or devops, cicd
If I have > 10 tabs open, I feel stressed because it means I'm not actually completing tasks. Anything more than this seems like ADD.