As opposed to the new ones?
Note: I don't think I've ever seen an engine with points, let alone worked on one
The Googlewebs says that GM used HEI from 75 to mid 80s . Before that it was points type distributor.
I remember we had a 68 Catalina and dad had a 69 Chevy pickup. I can remember him setting the points on the pickup until 78 when he bought a new K5 Blazer.
I was about 12 and vaguely remember him doing it.
You probably have worked on those older vehicles but people had threw in an HEI distributor before you saw it.
My old 67 chevelle had points but I went back with a Mallory electronic ignition. Same with my inherited 73 Corvette. Dad swapped in an electronic distributor.