I agree with Don Meixner... that it was a nice trip down memory lane. For a few moments I was in my university youth again, filled with fond memories of good friends and great times triggered by specific songs. I didn't care particularly if it was official folk or commercial folk or any-other-adjective folk. It was music that I liked back then and still do. That's all that counts to me.
I remembered the lyrics and could sing along with most of them from start to finish. After 30 years, that says something about those songs. See if that happens with today's pop drivel!
Quality of performance? Probably a C+ at best... but I still watched it!