It's been many years since Obj-C was relevant to my life, but I remember reading about some of the implementation details in the runtime and just absolutely boggling. Not in a bad way, a "wow, they've really done about as much as anyone could possibly do to get this performant" way. Distinct mental image of starting at a nice clean relativistic scale and then zooming down into quantum nuttery.
We need a Powers of Ten with programming languages.
We need a Powers of Ten with programming languages.