That there are no individual particles is something of philosophical import that it'd be difficult to say without bludgeoning the point home, as the possibility is such a strong implicit philosophical assumption and physics having actually delivered the smackdown may be surprising.

Yes, that's the one thing that really relies on it. And the physics smackdown was surprising to me when I read it.

But yeah, even that could be moved elsewhere with effort.

Ideal would seem to be having the QM sequence then later having an identity sequences wherein one post does an "import QM;".

Of course the whole formal 'sequence' notion is something that was invented years later. These are, after all, just a stream of blog posts that some guy spat out extremely rapidly. At that time they were interlinked as something of a DAG, with a bit of clustering involved for some of the bigger subjects.

I actually find the whole 'sequence' focus kind of annoying. In fact I've never read the sequences. What I have read a couple of times is the entire list of blog posts for several years. This includes some of my favorite posts which are stand alone and don't even get a listing in the 'sequences' page.