Nothing prevents you from enjoying your music with better headphones. Sure, you might be missing on air, details, realism with mp3. But if those better cans have good rumble and make you bop your head more often, that's more important.

I went the highest resolution possible route, with ultra high quality flacs, upsampling, and a can of HD800S, and yeah it's a good improvement. But I can listen to mp3s on my phone with IEMs in the street and still have a kick ass time, it may not be audiophilia but whatev