fredthebear: No sense of danger? A case of generalized over posting without analysis. Better to strive for quality, not quantity.
In a tiny sample size, 8.0-0-0 is the most popular move in the database, scoring over 50% wins. Even a club player would recognize that White arranged to play the popular 150 Attack on the kingside, where castling opposite is standard fare for White. After 8.0-0-0, White retained a slight plus.
For those wondering why there are not more game examples, it's because Black expanded quickly on the queenside and did not castle short, early. Over the years, Black has developed ways to deal with the 150 Attack, one of which is not castling kingside into the attack, another is advancing the b-pawn.
Instead of retreating the knight (a clear sense of danger), 10.Ne4 gives White an edge. In other words, White was well-positioned after castling long but ran out of opening theoretical knowledge.
To be clear, White aborts the 150 Attack, which typically seeks to exchange dark-squared bishops and pawn storm the 0-0 castle, in favor of the 9.e5 pawn break.