I've always found tabs to be pretty limiting, though I have a ton of them in Firefox and Konsole since that's what's - been - available. They're marginal improvement over multiple windows. Then Horizon[0] came on the scene a few weeks ago and I fell in love with that infinite canvas. Started tweaking it like crazy, but now I'm working on a full port that natively supports Xpra[1], so I can have all my apps on an infinite canvas with views grouped exactly as I prefer. And that's the future IMO.

[0] https://github.com/peters/horizon [1] https://github.com/Xpra-org/xpra/