I was listening to H.G. Wells on audiobook today and it's both cool and sometimes difficult to listen to the old timey English. Like it's close enough to be familiar and mostly understood, but also different enough to sound like a whole other language.
Language evolves and I think that's cool. The more people we have and the more ways of communicating, the more it will evolve.
This modern slang is damn gibberish. Back in my day, at least our slang made some gramatical sense, it was simply noun replacement, and some adverbs/verbs. Now get off my lawn.