That reminds me - I need to add the NoMouse package on one of my installs. The trackpad on my laptop’s keyboard is too sensitive and does a “click” if my fingers are anywhere in its vicinity.

I think it’s because it’s more natural to represent a tree with a linked list. The body of Lisp code is also a tree - some even say an “abstract syntax tree”, but that’s not fully accurate - which facilitates the syntax manipulation done with macros.

Mathematica