I appreciate where you're coming from, but as it says in the article, UUIDs are really unnecessarily long for no good reason. The traditional hex encoding is also much longer than it needs to be.
In any case, the article exists to help you decide how long you need to make your ids for you to be comfortable. If you decide you aren't comfortable with a 1 in a million chance, the math is there for you to figure out what does work for you.
In any case, the article exists to help you decide how long you need to make your ids for you to be comfortable. If you decide you aren't comfortable with a 1 in a million chance, the math is there for you to figure out what does work for you.