Yup, there's a book called "Because Internet" by Gretchen McCulloch that details intergenerational linguistics. Ultimately a lot of the answers boil down to "because internet" thus the name of the book, but it digs into the various causes of linguistic shifts in generations. Interestingly "written" communication has become much more relevant and so people have developed styles, techniques, and quirks to represent themselves. We see trends like young people not ending their sentences with periods, the use of ellipses, capitalization and more

Remember, linguistics is a descriptive science and not prescriptive. You can't control how people communicate but you can observe trends