Not sure how SM saturation breeds short attention span. I guess it depends on what you will allow to indulge in. 80% of it I won't put up with so I just move forward. It's been said many times that PPOT is pretty high quality compared to a lot of time wasting crap. You can waste time here too, but at least you're wasting time at a better level.
Also I find that if you have a hobby, joining a forum can be beneficial (if you stay out of their OT forum). I have run through at least a dozen as I pursue this and that.
Wait, that's a short attention span.
