Hugo Kornelis dives into the arcane:
But what you probably don’t know is how that hash table is structured. How is the data stored? Where are new rows added, how is the table accessed?
To be fair, none of this is useful knowledge, unless you work for the engine team at Microsoft. And if you do, then you have access to source code and documentation, so you won’t need me to explain this structure to you. So why do I even take the trouble to investigate and describe this structure? Because I am a geek, and geeks love to dig into technical stuff and uncover things they were never meant to uncover.
“Because I can” is a perfectly valid reason to dig into a topic.