Streams

The radio was the first form of entertainment that was a stream of endless content (designed to sell ads). The TV soon followed.

Prior to these inventions you had to take action to continue to consume content (the record player being a good example).

The internet enabled a new form of endless content, enabling many more places where you can endlessly consume (and be endlessly sold to).

Maybe novels are the last form of classical entertainment that requires action. For one, you need to keep turning the page, and keep picking up the book. For two, you are paying for the thing itself, without it being subsidized by companies trying to sell you something.
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