PETRA means "Rock" no more

Am I the only one who did not know that PETRA - one of the first and longest running Christian rock bands - is retiring?! Apparently, after more years in the market than I have been alive, they have decided it is too late to update their musical style once again. They kicked off the Christian Rock genre with their early works, and kicked off the Praise and Worship revolution with the album "PETRA PRAISE: The Rock Cries Out". Now, they are apparently kicking off the mass move of Christian artists to the old age home. Sigh. But apparently they gave a Farewell Concert, and ChristianDiscs.Com has the final album. All I know is the new guys have some pretty big shoes to fill, if they want to replace the large spot PETRA has in my CD collection.