Must be price then.
It is price, along with features. A 50 inch Samsung or Panasonic can be had for $650 or less if 720p isn’t a problem. Power consumption is just as a good as an LCD and the weights are comparable. Burn in is no longer a problem. Refresh rates are 600hz, and picture quality is better.
I’ve got a 50” plasma. Noticably better picture than LCD’s or DLP’s. I wouldn’t even think of trading it for any of the others.