Earlier quoted context omitted.
I've been wishing someone would make something like this! Always frustrated me that tools like aimchess and openingtree only allow you to look at the two sources separately.. supposedly, at least in aimchess's case, the reason being that the rating systems are different. How do you unify ratings? Edit: ah I see you don't, makes sense I guess. Might be interesting to have them both on the same graph even if the y axis…
As you say, I currently don't. In the future I might check the correlation between chess.com/lichess (when enough users register). Then I should be able to even calculate the chess.com rating from a lichess rating and vice versa. But there are many other features I want to implement first. I'm currently more focused on the statistics part than on the chess.com/lichess relation.
I also found that when clicking through to an opening on your site, it would always say "no games find at this position". Bug?