Sicilian (Dragon)

I believe that there isn't any line that refute the Dragon. Why is not played in the elite? Only Gawain plays it.

openings come into fashion and go out of fashion.

It is said to be better for white if he plays correctly but the theory goes on for 20+ moves

I used to play the opening a lot and it is really sharp and leads to a lot of attacking games

There isn't a line that refutes the Russian, Spanish, or Italian. But at the higher levels, you must know either many defenses or the correct theory deeply in one defense. Especially with the help of computers, it's too easy to prepare if you know your opponent's pet lines.

#1.

London System gives easy equality, but it is played in the elite level.

It's not good for black, practically (and I think objectively) speaking. Refer to the famous Bobby Fischer quote about how a club player playing white could easily slaughter a master playing the Dragon with the Yugoslav attack. Or just check a database.

People come up with 40 year old quotes which truth content goes to zero nowadays. It stems from a time where the Dragon was unxexplored. Chess has so much changed.

Always the same, die-hard myths: gambits are refuted, blitz is bad and so on.

Dragon is ok, some GMs play it but it's not the latest fashion.

The dragon is not OK. In the 2016 TCEC Super Final Stockfish 8 and Houdini 5 both won their Sicilian Dragon against each other with white.

I'm going to explain all the lines of the Dragon. First, in Spanish and later in English (study). I'm going to defend the black's position ;)