We've also lost the bass and horn section.
Once upon a time, soundtracks weren't just filler. They we're integral to the story. And at times they were the story.
One of the most recognizable pieces was John Williams "Shark" theme from Jaws (1975), originally performed on the tuba by Tommy Johnson. A simple alternating of two notes, either E and F or F and F sharp, it was the lead in the movie. Steven Spielberg was initially dismissive of the piece, but I think we can agree that Williams has been proven right.
Personally I love a good soundtrack, I love music that evokes the experience of the film even years after I've seen it.
John Barry's "James Bond Theme" reminds me of a spy: Sneaking in, picking up his pace, and bursting into action. Bill Conti's Gonna Fly Now (Theme from Rocky), takes me on a desperate running tour of Philadelphia.
Star Wars Main Theme is the movie, it starts slow, explodes, slows, builds up, and flies. Hell, imagine Darth Vader without the Imperial March. The first 17 minutes of 2001: A Space Odyssey is nothing but music.
Imagine Superman (1978) without any music.
There used to be a time when a soundtrack was more than a chance to get on Billboards' Top 40. It was integral to the movie and the last time I can remember it being used so was Guardians of the Galaxy (2014).
That was a risk on the part of James Gunn, but that entire movie was a risk. We need to return to the roots of the soundtrack, a time when you bought an album not because of who was on it, but because of how it made you feel.