Today's music is enjoyable/momentary, but yesterday's is something that soothes the soul and will last forever. May be they were lucky to have great composers, singers, lyricists. I would say 50-60-70's as the great/golden era of Indian filmi music. Also yesterday songs were more about simplicity of bol-sur-awaz. Now it's more complicated with the musical instruments and the fillers, than using good bol-sur-awaz. Naturally logon ko saadgi asani se yaad rehta hai.
Today there is scarcity of good composers(except for ARR, Shankar-Ehsaan-Loy,Ismail Darbar - that too good work is very rare),singers and lyricists(only Gulzar,Javeed Akhtar).
Remix!!!!!!!!! I am dead against. Agar shakh hai to please listen to "yeh mera dil" by Sunidhi and also by Asha Bhonsle ya "khaike pan" by Udit Narayan and also by Kishore Kumar.