Fares wonderfully to play my MP3 collection (...which includes hours of music I made myself and isn't available elsewhere).
EDIT: to clarify, that's to say that in the age of Spotify and streaming services there's still a place for something that's just an MP3/audio player.
(And with Winamp's FLAC support, there's maybe room as a player of high-end 24/96 recordings sold by stores like 7digital as well.)
I'm STILL using mainly Winamp. I've tried some alternatives but for my old MP3 collection it's unbeatable.
Reverse engineering is possible here, but will result in ban/lawsuit after it gains some traction.
How they're gonna do that then? No idea.
Still I dream about alternative client every say
[0]: https://developer.spotify.com/documentation/web-playback-sdk...
https://jonaslundqvist.net/2015/05/06/do-not-use-libspotify/
On the other hand I think they are very opposed to other clients supporting Spotify Free, which is understandable.
There is librespot [1] if you want to try and do something yourself though, it's a reverse engineered client for Spotify's protocol which Spotify so far doesn't seem to care to kill off.