I think that's so smart. There's lots of people who totally get hung up that they had one drink, think they threw away ten years of sobriety and then make an excuse to drink again that since they lost those ten years what's having another drink. He had one, realised it had no charm, and stopped. The ten years didn't stop being sober just because of that :P
I think the most prevailing results are when people realise alcohol isn't magic. It's just a dumb drug that shuts off parts of your brain and hits you with dopamine. It's like the successful unromanticification of alcohol. It didn't regain romance when he tried it again because it had already lost its romance permanently. Some people even sober still romanticise it, and they are heavily at risk because of it.