I'm sorry to hear that Nobody should have to wade through 1500+ tabs.
It's frustrating to hear anyone struggle with that in this day and age. I've been there myself. But there are technical solutions.
I haven't had to deal with tab anxiety in years.
My browser stack is Tree Style Tabs, Session Manager, Multiple Tab Handler, and Tab Group Plus.
I regularly wrangle clusters of tabs.
If I have a tree of tabs that is spawned from an HN story or something, I can drag it into a new window, and then export it to a tgmg file from Tab Group Manager, put the tab collection file in my repository, and put a reference to it in my knowledge base. I might also embed it in an rtfd file.
If I don't need that kind of structure, I can just use shift or ctrl to bulk select the tabs I want, and paste the urls into my knowledge base. And effortlessly restore the list of urls to a new session when I want.
I'm able to re-create not just specific urls, but the context that I browsed them in.
If it is months or years later, it is really helpful to have a tree or list of urls, and maybe some notes. That makes it so much easier re-inhabit my state of mind during that research session.
I doubted whether it would be worth perusing, but I'm really glad I did. I love being able to recall research threads I started years earlier.
Unfortunately, it takes some effort to get set up to digest lots of tabs. I wish that this was recognized as more of a problem. It is so idiosyncratic that we are using open browser tabs as a temporary database to store lists of urls. Browsers should combine history, tab management, and bookmarks. It makes no sense anymore for those features to be separate from each other.