Originally Posted by Piobaire
If that was addressed to me, no, I was not being sarcastic. I might be wrong in that statement but it was a conclusionary one.
Since each "decade mode" is still using the same power tubes, you aren't saving any life on the tubes by using different modes. You're burning tubes at the same rate no matter what mode you use. IE: 2 hours played on the 70's mode and 2 hours played on the 80's mode is still going to equal 4 hours of power tube burn.
gomestar is also right in reference to most people buying tubes due to curiosity rather than necessity, although the "Oh it sounds better" sound you get from trying a different brand of tubes can often be a result of your original tubes being a bit older and flat sounding. Just because a tube is still working doesn't mean it's generating its optimal sound. This is why NOS tubes are getting to be so lusted for. Those tubes tend to sound great through the entire life of the tube as opposed to newer ones that simply don't have the tolerances in place to stay fresh that long.