I agree, your description is more why I like it -- the only websites that get to save any state are the ones I pick to open in specific named containers and which I also specifically granted permissions to with uMatrix (RIP).

Everything else opens links in a new container with the hope to make it as close as possible to looking like a different person clicked that link. I know it won't work that well since the IP doesn't change nor the user-agent, but at least it helps with the most lazy tracking.