My daughter started using “essentially” when she was only about 20, but doesn’t use it so much anymore, ten years later.
I welcomed it because it sounded good in the contexts she used it in, and was proof she was developing a precise and thoughtful vocabulary. She NEVER says “like”.
And you’re right, “actually” is a word we hear more and more, mysteriously and needlessly slipped in not in place of any other word, but just as an inessential addition to a sentence, like the ones in your examples.
‘Really?’