Anyone interested in language ends up writing about the sociological issues around it.
David CrystalLanguage itself changes slowly but the internet has speeded up the process of those changes so you notice them more quickly.
David CrystalSeveral of us linguists at that time would record our own kids, just to get some data. There was some literature on it then, but no day-by-day, blow-by-blow examples. I recorded all my children over the years in some shape or form. It's what linguists do. You don't talk to a linguist without having what you say taken down and used in evidence against you at some point in time.
David Crystal