Hi, I am @Noobbatter, a mediocre 1800. I truly love this site, but have a feature request. I know it's gonna be a huge project, but I hope that someday lichess will add it.
So basically: You play against YOU but skilled at a different time period. Lichess analyzes positions and the moves that you would have played back then, and would play that move or a similar one. I am aware that this is harder with less games, easier with more games. I would really think this would be an amazing feature. Please leave any feedback. Thanks :-)