I do. I have a gigantic collection of rare track rips in MP3 / 128 kbps, both downloaded from the days of Napster / Emule / eDonkey, ripped from CDs and cassettes or from recordings I made in raves.
Since then, I moved across 7 countries and I lost all that physical media in the moves - when I didn't ditch them on purpose to travel light.
All I have left is my collection of low-fidelity MP3s. I still listen to them all the time. They're not always that great, being what they are, so any MP3 player that improves their playback somehow is a win for me.