I have a lot of interests and things I do, if I see something I like online, I keep the tab open. This way, I've accumulated a lot of tabs, I've allocated a small amount of time in my daily activites just before sleeping in which I chip away at different tabs. That way I learn new things daily and get to close a lot of tabs. I can say I have over a thousand open tabs.
That said, I have a lot of browsers. I can literally say I collect browsers, but they have to be Foss or non-chromium. On my linux install, I have 12 browsers, I generally use or have open tabs in 8 of them, the rest I use from time to time. On my previous arch-install, I had over 15. On my lineageOS, I also have 12 and I'm still getting more from F-droid. I use around 6 on here.
Like I said, I group my tabs by interests, i.e tech, education and open new article depending on the topic in each tab. I use LinkSheet on android and Junction on linux. If I like a tab and want to keep it around, I use Native Alpha on android and Tangram on linux to create web apps for them. I open and save wikipedia articles on the Wikipedia apps on both OS's.