It’s interesting that the article never defined what an 18A process node is. That seems a key concept to understand it.

Edit: found this

https://www.xda-developers.com/intel-roadmap-2025-explainer/

I still don’t know what a node or process node is though.

Edit again: here you go

https://www.howtogeek.com/394267/what-do-7nm-and-10nm-mean-and-why-do-they-matter/

It refers specifically to the transistor size and spacing.