I think, and I believe this was mentioned earlier, artists generally take less chances as they age. Sometimes you can't reach back and recreate the same mood or atmosphere that led to those epic jams. Maybe the "cleaner" scene has contributed to it too. But I'd rather see what I'm seeing now then have it be like Jerry's last noodling years, or see the Stones show up just for the paycheck. They look like they're enjoying being out there, and that transfers directly to the crowd.