I had my phone audio on mono for ~6 months without knowing it by accident, and I switched it off today, allowing songs to make full use of my car's surround sound speakers. Contrary to my expectations since you are a small indie producer with little/no outside help, your songs made great use of it (particularly when i get older). Do you design music with different types of speakers that might play them in mind?
the goal is to try to make it sound as good as possible on any device