Buttons shouldn't have a hand cursor part 2 by Adam Silveradamsilver.io
The history of the pointer cursor In response to part one, Mark Griffiths explained the history behind the pointer cursor.
It first appeared in Apple’s HyperCard in 1987. It was used to signify things you can click. When the Internet came along, Mosaic used the pointer cursor just for links.
That’s the first time the convention changed as far as I know.
Some people think the convention has (or should be) changed back to its original meaning. In the context of HyperCard, the pointer cursor really did mean clickable. If you clicked anywhere that didn’t have the pointer cursor, nothing happened.