Well I completely feel you there bro! If your phone suits your needs as is, then no reason to carry around another device!
I just got the Walkman around Christmas because I have been Recording HQ 24bit stuff since 2006, and was just streaming mp3's through Google Play on my Pixel phone, and wasn't taking advantage of my hi resolution Recordings.
But I absolutely LOVE the Sony NW-A35 Walkman>Westone UM Pro 30 IEM's. The sound is unreal and scares me how good it sounds! Takes me RIGHT back to the show/concert and has awesome details, clarity and resolution across the whole frequency spectrum!
And I just upgraded MMCX Cables to a brand new Linum Bax MMCX Cable Straight from the UK/Denmark, and now my setup sounds even better, which I really didn't think was possible LoL 😁