You're never too old to learn new songs or styles - it just takes a little longer. I listen to the few songs I recorded 30 years ago (when I ran a folk club and had a repertoire of about 120 songs) and those from 15 years ago (when I sang mostly for myself and family). Neither period sounds anything like the 20 or so songs I sing now.

I don't know what I'll be singing 15 years from now, when I'll be 88!

Phil