"Total pp across all rulesets" leaderboard / stat in profile

[Doxxz]

I think it would be a cool addition for those that play more than one mode, and would perhaps motivate more people to play the other rulesets.

As an example, here are two websites that do this:
https://osekai.net/rankings/?ranking=All+Mode&type=Total+pp
https://osudaily.net/ranking.php?m=4&t=pp