I think music theory—including ear training—would disproportionately increase classical appreciation (but would also improve appreciation for other forms too). The reason is simple: classical music is more complex musically, so it rewards a more discriminating ear and a richer sense of harmony, counterpoint, etc.
There’s a lot of popular music that I love and think is very interesting musically, harmonically, etc., but classical music is usually so much deeper and requires much more skill and musical knowledge to create (and also to appreciation). If you want to succeed in the classical world, as a performer or composer, you have to start by the age of 6, you have to be supremely talented, you have to work obsessively until you are accepted into a good conservatory, and then work even harder still. Your entire life is basically nothing but music from a very early age. That was true of Bach, Mozart, Beethoven, etc., and it is still true today. The situation with popular music is completely different. You can pick it up as an adult, and if you’re talented, you might still have a successful career. You can pick it up as a teenager, and within a few years have developed enough musically to be on par with almost any other popular band. It seems pretty clear that something that takes decades of study and practice (and involves study of hundreds of years of music history) is going to involve more skill (and make more use of skills acquired) than something that can be achieved in years of study and practice, and when the composer is relying on decades of study and their intimate knowledge of hundreds of years of changes in music theory, counterpoint etc., it is definitely going to take some work on the part of a listener to do more than skim the surface in terms of enjoyment and appreciation.
I think music theory—including ear training—would disproportionately increase classical appreciation (but would also improve appreciation for other forms too). The reason is simple: classical music is more complex musically, so it rewards a more discriminating ear and a richer sense of harmony, counterpoint, etc.
There’s a lot of popular music that I love and think is very interesting musically, harmonically, etc., but classical music is usually so much deeper and requires much more skill and musical knowledge to create (and also to appreciation). If you want to succeed in the classical world, as a performer or composer, you have to start by the age of 6, you have to be supremely talented, you have to work obsessively until you are accepted into a good conservatory, and then work even harder still. Your entire life is basically nothing but music from a very early age. That was true of Bach, Mozart, Beethoven, etc., and it is still true today. The situation with popular music is completely different. You can pick it up as an adult, and if you’re talented, you might still have a successful career. You can pick it up as a teenager, and within a few years have developed enough musically to be on par with almost any other popular band. It seems pretty clear that something that takes decades of study and practice (and involves study of hundreds of years of music history) is going to involve more skill (and make more use of skills acquired) than something that can be achieved in years of study and practice, and when the composer is relying on decades of study and their intimate knowledge of hundreds of years of changes in music theory, counterpoint etc., it is definitely going to take some work on the part of a listener to do more than skim the surface in terms of enjoyment and appreciation.