I remember there was a store near me that would sell the points alone. Just had to ask for them and they had a whole drawer full of them somewhere. It was a couple of years ago, so I don't remember all the details, but it started out as a way to carry a spare set of points, and ended up being a cheaper way for a tune up. I'm a pack rat so I still had several old condensers laying around that were still just fine in case one ever did go out.
I changed them every once in a while because it seemed like the right thing to do, but I don't remember anyone having one actually fail.
As I recall, the pitch was that over time the capacitance ability would break down and that was what helped make the points
pit or get a sticker on them. Too long ago to really remember
Wanna buy some super spark plugs with multiple negative electrodes?