They do not cover the same use case. If you have 80 tabs each for 3 different topics, you end up managing 240 tabs. It's sometimes more manageable to split this off into entirely different browser profiles (or browsers, even).
> If you have 80 tabs each for 3 different topics, you end up managing 210 tabs
Is this a typo (80 x 3 = 240), or are you suggesting 30 tabs are deduplicated in some capacity?
It was a typo, thanks for pointing it out
You can use Tree Style Tab or similar (AFAIR there are a few different extensions with different tradeoffs for similar features).
I already do. It makes the problem somewhat more manageable.