To me, Coin Joining and Mixing is definitely superior. While swapping history helps turning transparency into a less reliable source of information, Mixing and Coin Joining does much more than that.
I agree, but as an extra thought, no reason you can't do both.
Mind sharing your thoughts about Sparrow? I noticed you claim to not have tested it out yet. But I thought you may have an opinion about it.
It uses Samourai's coinjoin implementation, so my main issue is the same issue I have with Samourai - can I run it through my own node? Running it as a light wallet through a centralized server means the centralized server can see all your addresses, same as with any other light wallet. With Samourai, you can avoid this by running your own Dojo server. I'm not sure yet how it works with Sparrow. witcher_sense has said above that you can point Sparrow to your own Bitcoin Core instance, but I'm still not sure how it then communicates with the coinjoin coordinator and if it does so privately. If I had a real need to use Sparrow then I would look in to all of this, but at the moment I don't so I haven't bothered.