This is either people being sarcastic or annoying snobs. And if it's the former, it's not very funny.
Inventing new words is useful for new objects or concepts. The marketing people call everything they make up a "new concept", though, so they're messing up the language the most. Re-using a perfectly fine modern word and assigning it a different meaning (epic, awesome) for which there already were perfectly good words, is just degeneration.
Tell that to "conversation." It used to mean "sex" if one of my high school English teachers is to be believed. I demand that we return it to its original meaning to reverse some degeneration of the English language.
Honestly though, I'm always wary of grammar nazis and language snobs. It's all just a bunch of adults telling kids how not to talk, a bunch of white people telling black people how not to talk, a bunch of rich people telling poor people how not to talk, and various other things. It always seems to line up with the more powerful group using language policing to boss around the less powerful group (barring hatred of political/marketing language such as "the american people" or "xtreme"). And when it's always like that, how can I not suspect that you have motivations other than preventing "degeneration"?