Strong Opinions on URL Design

All good advice IMO.

The _reason_ for the /posts/98765/my-dumplings-recipe pattern is SEO (ugh).

It is thought that search engines give extra weight to urls which contain relevant keywords.

You can invariably put anything after the id and still get the page. This has the bonus of freaking out the marketing team when they spot '/posts/98765/my-giant-butthole' in the analytics.