I have two brand new points plates from Honda waiting to go on a 550 that needs them. I bought the points plate assemblies back in the late 80's, early 90's. I remember they were $47 each. (Dyna was $110 at that time) The plates sit in the garage drawer waiting for the time I can't redress the points at 3000-5000 miles intervals with a quick swipe of a points file. I do worry about the condensers remaining uncharged for all these years. So far so good on that. I think my 74 CB550 is on its second new points set since 1975 and 55000 miles. The first one was replaced due to rust issues, stemming from a bad cover seal (3-4 months a year ridding in wet weather here). The second one was when the parts counter man convinced me a new one would make it run much better. It didn't. He also tried his best to sell me that Dyna-s. All the rest of my bikes have the same points and condenser set they came with, redressed and checked for function, of course.
When the points rubbing block wears down, or I run out of point contact material, I have a replacement waiting to go in. Anybody that tells me the points have to be replaced frequently, simply doesn't have any credibility with me. Yes, they do need more attention than generic "electronic", and they have a degrade curve, particularly if your maintenance routine is lax/lazy. But, they don't have any real reliability issues for those that are able to pay at least a little attention to them.
If the Dyna-s wasn't a flawed design, I might consider it an actual upgrade. While the 750 can tolerate it's power hogging abilities, particularly with an additional battery upgrade, the smaller bikes struggle with it, or require a more restricted riding regime/envelope (biased toward higher RPMs), and projected battery life issues, due to an over taxed charging system.
Cheers,