I too know more songs than I can remember. When I first got a computer I thot my troubles were over...I made a song list in 7 pt type and could get a lot of my favorites on a strip of paper that I could museum tack stick down on my guitar. Now, however, I can't read that list, and doing pick-up playing there is often not a lot of room for notebooks, palm pilots, etc. As far as learning goes, the old The more you do it the easier it gets is fine to a point but I think I'm over the hill, on the down side of the learning curve. I used to be able to go backstage years ago and get a singer to sing their song just one more time and I'd have it. 40 yrs later and it now takes endless repeats while driving to town, etc. to get it.