I think this is a very modern thing... because internet. "The medium is the message" applies to writing more than anything. The medium has been rapidly evolvin

I think this is a very modern thing... because internet. "The medium is the message" applies to writing more than anything. The medium has been rapidly evolving. Average people wrote very little pre-PC, and the contexts are totally different. Much higher rates of output, frequency, etc. Bullet point style is good for information dense messages, provided they are short enough. We do a lot of this now, it's how we "talk" at work. The style isn't new, it's just that many more of us have a use for it today. In the past, it was common in a military context, for example..