In 2010 I was at my first job out of college and frustrated that iTunes took over such a huge amount of resources on my PC. But I loved the UI look and function and the way it had playlists, and didn't like the other options on the market. So I hired a cheap overseas freelancer to build "Litetunes", which I requested look and function exactly like iTunes but be <2MB file with no installation required that would open quickly just like notepad or calculator. I thought of distributing it but ended up using it just for myself, it worked great.