This makes things clearer, but I still have some doubts.
Quoting from Reddit's wiki:
Does this mean that, if I replace an ability in a socket, the replaced one loses all its points?
What's the deal with discarding points?
Do characters have a point cap, so you better avoid increasing bad abilities?
Or maybe, when an ability has a point it starts getting more RNG probabilities to get other points (so, again, better avoid points on bad abilities)?
Or... you simply don't have control over sockets, so the game automatically activates the first 1-6 skilled-up abilities, and only then you are allowed to replace one of them with another (losing points)?