I really cannot understand people who say they are ok for situations like traveling, meaning they do not have many demands or expectations from such situations! That’s quite strange! Don’t you need high quality sound while traveling? Only sitting on your sofa you need good sound? Not all in ears as you write, suffer from mid frequency problems. It’s just AirPods that present so thin mids and most importantly non existing low bass, due to the non existent seal to the outer ear or ear canal. In ear or over ear headphones are quite capable of reproducing all frequencies but ear buds like the AirPods, due to their small size in conjunction with no seal, cannot produce low frequencies at all. As a result the audio spectrum stays “naked” of any warmth, giving mainly scratching highs and thin mids. This is the sound of AirPods, unfortunately! I’ve got them from the first month of release and even though I find them the best idea in audio, ever, I believe they are not meant for high quality music listening. They are mainly made for phone conversation since also in that use scenario you need to hear your own voice, thus you do not want seal. BeatsX and Studio3 are offering thousands of times higher quality sound, deep low frequencies and full spectrum representation. I believe that Apple is in desperate need of true wireless in ears, not ear buds, so that they can offer you the desired noise isolation, whenever you need to really enjoy your music and not the metro rails’ extreme noise!