Wasn't Magical Mystery Tour released as a double EP in the UK, unlike in America where it was released as an album, and the UK only went over to the album version in later years?
Yes its back to those wonderful days of vinyl before the oil crisis and artists were able to develop without being dumped by the label.
Whether 1973 is the best year for albums, who knows but a selection releases in 1973 and which are still played today:
Billion Dollar Babies - Alice Cooper...