Playing online started to feel like an addiction. Most people end up playing blitz or rapid which even reinforces the addictive behaviour. Over time I felt like there's not much difference in the way I play chess to playing any other online game.
But there's nothing better than meeting a friend in a cafe and have a good game over the board.
Such game forces you to focus even more because you have that friendly rivalry going on and you've been keeping a score. I can imagine real competitions are even more intense.
That's something different than playing against some anonymous nickname online.
Paul Morphy said "ability to play chess is a sign of a gentleman. The ability to play chess well is a sign of a wasted life"
I personally get much more of what I expect from chess when playing in person. Playing online has become a compulsive behaviour and quite a meaningless activity once you reach certain level in ratings - the point when you learned the most chess can teach you about life and strategy but getting better requires harder and harder work while lower and lower return other than bettering your ratings.
So no, for me the classical format must live on else chess will become replaceable.
PS: I encourage everyone to grab a board, go to the nearest cafe or wherever, open a nice bottle of your favourite beverage and have some good battle with a friend over the board.