I can only speak for myself. Less masturbation = less thinking about sex for me. When I do it regularly (i.e. not too much) I'm more dialed in sexually with the world around me and thus vice versa. If I haven't done it that means I've been busy with regular life which is fine. Just like with no-fap, all of this is mental and mileage varies. Your body will not overstore semen, it will regulate (or you'll have a wet dream).
As long as it's not causing negative effects physically, socially or sexually, it's mostly upside IMO. Careful with online porn though. Try to rely on your imagination.