If I'm reading this right, you must be one of the very few people on Earth to use dash when you have the option to use bash.
I think you misread that. It sounds to me that he didn't realise he was using dash because it was bundled with Ubuntu and Ubuntu being a large distro with lots of defaults, it took him a long time to find this out. Your comment just validates his point because he didn't want to use dash at all, he just didn't know he was using it until a lot later (possibly after the differences already wasted his time).
If I'm reading this right, you must be one of the very few people on Earth to use dash when you have the option to use bash.
Anyway, I don't use bash, either, but that's because I moved to zsh before Ubuntu even existed. I think I was using Slackware then.