I use Chesslab.com as a database for opening research. It's well maintained and reliable, and serves my purposes very well. I know many players like to maintain their own databases of master level games, but I've never had much interest in doing so. It's not that I can't -- my professional background is in database management -- it's that I know how much effort database maintenance requires and I have other ways I like to spend my time.
As for my ongoing Sicilians, the game with the least theory on the current position has about 40 examples on Chesslab. The games with the most theory still have many thousands of examples, including hundreds of games played at the super grandmaster level (>2700). I'll probably reach move 15-20 in those games before I have to start relying on my own chess sense.
In contrast to those Sicilian games, I started two new chess960 correspondence games this past week. Neither game has reached the third move and both are already demanding deep analysis of candidate moves and their consequences. The event is the fifth round of a knockout tournament, so my opponents are both experienced chess960 players. One slip at an early stage will likely mean a lost game.
A few years ago I wrote a post about Differences Between Chess and Chess960, where everything I said still rings true. I might add that traditional chess covers only a tiny portion of the universe of interesting chess positions. The difference between chess and chess960 is like the difference between a small hobbyist telescope in your back yard and the Hubble space telescope.
I'll close this post with another plug for Chess960 Jungle. HarryO wrote this week about The chess clock - when it should start ticking. It's an important subject that's given short shrift in the implementation of online chess960. I imagine that most chess960 software developers are building on an existing implementation of traditional chess and reuse the same clock specifications that have been developed for the traditional game. The considerations for chess and chess960 are, however, a world apart in the opening phase.
In traditional chess you're basically on autopilot for the first few moves because you've seen the start position thousands of times. In chess960, you're on your own from the very first move. It is fundamentally unfair to let White consider the first move without using clock time, then start the clock for Black as soon as White has moved. You could say that the unfairness applies to all players 50% of the time, but if you're playing a chess960 game for an important prize and you happen to have Black, that 50% argument doesn't help you. I could say a lot more about this last topic, but the Sicilians beckon. Maybe next week...