BSG - I can see them getting rid of the ships, but living tech free don't make any sense. If I was part of an advanced civiliation I would want to give up medicines, and other items that will make my life easy on whatever planet I settle on.
They kept the medicine (what little they had left).
The point of giving up the technology was to stop the vicious cycle from recurring, as though technology was the root cause of it. Two problems:
1. The root cause was not technology but human nature. Cavil's insanity was the fundamental reason for the attack on the colonies, but he wasn't insane because he was a robot; he was insane because he was too much of a human. His insanity was a human kind of insanity, not a robot kind. None of the Cylons were very convincingly robotic - they could have all been 100% human, who saw themselves as somehow different from the other humans, and had some grudge against the others, and the story would have been the same.
2. Giving up technology did not stop the cycle, since humanity has obviously evolved technology anyway. So Apollo's plan accomplished nothing in exchange for the pain, suffering and premature death it no doubt caused. Not only did Apollo's plan procede from a logical fallacy, it didn't even have the intended effect.
That's a good enough example of the fundamental problem with
BSG, which is not just in the finale. The underlying logic of the writing is poorly thought through and doesn't hold up to any degree of inspection.