All of this isn’t to say we should never use compressive images—never is a word that rarely applies in my experience. But it does mean that we should be cautious.
Another very good post by Tim and I very much agree. As with everything, it really depends on when and where to use it. For some cases it might still be a good solution and I have to say I kinda like it. Mostly and especially for displaying multiple images, you are probably better off with the newer techniques, but there's also no rule that wouldn't allow to combine the techniques that work best for you in each case.