It's better in the sense that you never have to faff around with the points ever again. It will also compensate for a lot of distributor wear that would normally result in timing scatter and the timing should stay exactly where you put it. It also gives you the option of using a higher output coil that would otherwise burn the points. It's biggest advantage as far as I'm concerned is reliability and elimination of constant maintenance.
Yes, electronic ign systems can fail but so can points and condenser. (Especially condensers these days)
When I bought my red TC 3 years ago, I gave it a good tune up, fitted new points, condenser, plugs etc and about 2 weeks later, it failed to start. It turned out to be a bit of dirt in the points but I fitted an old Lumenition system that I had and she has never failed to proceed since.
As far as reliability goes, that Lumenition system came in a parts car I bought 15 years ago. It was well used when I got it. It was fitted into my partners TC for several years before that car died, swapped it into another TC I had for a couple of years then fitted it to the red car 3 years ago. Never done any maintenance or upkeep on it. Still works perfectly.
I fitted a SimonBBC system to the V8 about a month ago and I would be surprised if I don't get similar service.