Pink Floyd Reunion - Time

"On April 28, 1973, Pink Floyd’s The Dark Side Of The Moon went to No.1 in the US. The album went on to enjoy a record-breaking 741 discontinuous weeks on the Billboard chart, and has now sold over 45 million copies world-wide. After moving to the Billboard Top Pop Catalog Chart, the album notched up a further 759 weeks there, and had reached a total of over 1,500 weeks on the combined charts by May 2006.". I had the vinyl, cassette, CD, and download of this album. Do concept albums still exist?