And in case anyone is wondering, I will admit to being one of those people who find The Motion Picture to be far more interesting than The Wrath of Khan.
The movie really did saved the series. Paramount was ready to throw in the towel on Star Trek after a lackluster and mediocre reviewed (at best) first movie. Another bomb and the Star Trek universe might not have survived. The success of Wrath anchored in 4 more movies for the series and arguably the creation of the Next Generation.
Bc its there, and i love it. More than any other movie I guess. Also there always seems to be new stuff to post about it, more than the other Trek films