I did a lot of classic Mac programming in its day. I knew how to react to the events, and how to use a Color QuickDraw window’s RefCon, and how to mark parts of a window for redraw.

I don’t understand how it works internally anymore. I mean I can program it, but none of the way linear logic used to apply.

I’m concerned that it’s internally very overcomplicated, because that’s how software is supposed to be designed now, but the “simplicity” is like a second system effect. A whole layer that makes clicking a button appear to work, when really there is no code flow that resembles the process.