"Nice headphones" is of course relative. I have two sets of Sennheiaer hd380. They plugged into anything and everything and sounded nice to my ears. They are super comfy. They still plug into my computer, synthesizer, and most of my stuff - but not of course my wife's iPhone.
(My old galaxy s2 had microsd, replaceable battery, grippy exterior,and of course 3.5 mm jack while being smaller in every dimension so I am skeptical as to some of the arguments other than "apple did it so entire industry will copy it")
As indicated above - I'm not am audiophile but I enjoy listening to music, and miss the easy convenience of 3.5mm jack on my phone along with everything else. A headphone amp would completely counter act the convenience and practicality.
It was perfect for the time. It's definitely lacking in features today, which is by definition true of any phone from that era.
I still have them both with me and in active use - mostly as remote controls, kids games, etc.
Perhaps more pertinently, my daily driver is a Galaxy Note 8, which also has a 3.5mm jack and MicroSD card. There's really nothing that my 4-generations newer, work-mandated iPhone has, in terms of functionality and definitely battery life, that Note 8 does not. iPhones are about sexy impracticality, and that's clearly where market has gone (Unlike S2 & S5, Note 8 also cannot be held without a case) - I'm just a old grouch who misses the olden days :).
(My old galaxy s2 had microsd, replaceable battery, grippy exterior,and of course 3.5 mm jack while being smaller in every dimension so I am skeptical as to some of the arguments other than "apple did it so entire industry will copy it")
As indicated above - I'm not am audiophile but I enjoy listening to music, and miss the easy convenience of 3.5mm jack on my phone along with everything else. A headphone amp would completely counter act the convenience and practicality.