I also use the tab stacking feature, so many related tabs are grouped together. Right now I have 2 full column of tabs and groups on the left side of my screen. It's actually very comfortable, although sometimes I clean up a lot of them. Like another user said here, I use them as bookmarks, or in my case as "read-later" lists, so I never completely forget about something I want to do or read.

I think it's a matter of habit. You can't use so many tabs if you don't have (at least) a multiline tab bar, preferably one aligned vertically.