It is not clear to me why permalinks are an important option, though it *is* clear to me that they must be since a lot of energy goes into them.
Is it the "permanent" bit, if so, what is impermanent about
as far as I can tell that 63 *is* permanent.
I have assumed it is to do with search engine behaviour but while there are always a million different theories about SEO, my understanding is that a link such as the one above is fine with the search engines (google in particular), that not only will it be followed but also it will not be ranked significantly differently from any other form of link.
What am I missing