Because Internet discusses various ways the internet is changing language, including how that has changed between generations. If the idea of language-change makes you clutch your heart in horror, then this won’t be the book for you: McCulloch is fascinated by the changes to language and thinks it is wonderful, pointing out that teenagers using all-lowercase and “lol” on the internet has not actually changed formal writing one iota so far. If you’re looking for outrage and someone to worry about the malign influence of emoji on communication with, McCulloch’s not your friend.
If you just want to read her observations and analysis about how people use emojis (they replace gestures in spoken language! we’re using text to communicate conversationally now, so we’re replicating aspects of verbal communication through the tools available like emoji!), how different generations of “internet people” use language, and turn-taking in chats, without assuming these things are bad, then voila! This probably is for you.
I’ve seen people complain that it was dry, but I found it very engaging; it probably depends somewhat on your initial engagement with the subject, and also on your usual reading fare. If you’re used to reading non-fiction, I doubt it’ll be any problem, but of course, your mileage may vary. I found that McCulloch’s excitement shone through.
I think a mistake some people are making is to think that because some aspect of the way they communicate online contradicts McCulloch, she must be wrong. From this blog, you’d never guess if the current trends are minimal punctuation, all-lowercase writing and SHOUTY CAPS for emphasis; obviously, I’d be an exception. (For reasons you can easily figure out: I have three degrees, including two in English Literature, and thus am highly trained in how to do formal writing and the historically “proper” use of the English language; I’ve been writing fiction since my early teens; I’m a reader, so I’m exposed to a lot of formal writing; I’m used to using HTML and Markdown to use italics for emphasis… it goes on.) She’s not describing you, Individual McInternetPerson: she’s describing trends, and for the aforementioned trend, you don’t need to spend long on Tumblr to find many, many examples.
I think there is something in the complaint that she’s a little prone to description rather than analysis. It does also get a bit “here is a history of the trends in language on the internet”, with some brief explanations of why that should be. I still found her enthusiasm in doing this and her particular viewpoint on it interesting; I hadn’t thought about emoji as gestures, or encountered the understanding of the internet now as where teenagers — dispossessed of the places they used to hang out due to rules against loitering — aimlessly talk rubbish to each other all day. It’s clear when you say it, but I don’t think I’d consciously stopped and thought about it.
Like I said, there’s no alarmism about the death of the English language — no prescriptivism about how grammar ought to be — so if that’s what you want, you might find yourself wanting to throw the book across the room. I just nodded a lot, and read a fair number of lines out to my wife because wow, that’s right! that’s how it works!