What is the point of 4K tabs though? If everything is open, nothing might as well be open because it serves no utility in tracking what you’re working on, right?
I often get into the 30-50 tab range, and the majority of those are unused and I have to do a purge because I’ve long forgotten the context where I need them. I can believe someone might do similarly with more tabs, but no that many more XD.
The thing is, I want my bookmarks to be tagged properly, to make sure, that I will always find what I search, provided I enter anything relevant. Website titles might or might not contain all the useful search terms. Tagging takes effort. I am lazy, so I do not bookmark and tag everything right away.
I also use an extension to group my tabs into categories, which makes it much easier to handle the amount of tabs.
In Firefox you type "%" into the url bar, which will search all tabs.
Also you can right-click the back button to see the history of each tab. Usually that begins with a google search that reminds me what the context was.
I try to keep all tabs for a certain topic in the same window, or two windows if I want to tile them to view both. Obviously, I'm very bad at respecting such limits. :-)
Have often gone at 2K+ (which maybe isn't absurd compared what others have opened) but max ~100 active rest being unloaded. Only issue had once was sidebar went into rendering loop on browser startup. Not sure what did to fix (should've maybe fill a bug report too) but lost the hierarchy so had to group them again. A bit time consuming due to the amount of tabs but not much since you can select and group multiple tabs.
I often get into the 30-50 tab range, and the majority of those are unused and I have to do a purge because I’ve long forgotten the context where I need them. I can believe someone might do similarly with more tabs, but no that many more XD.