AFAIK no, there is no limit to how many you can have.before I go bonkers grinding my npcs out, is there a limit to the traits they can have?
npcs indicating they have vacant slots which implies there is a maximum capacity yet some npc like Stacey have a ridiculous amount of them. This is throwing me off.
The number of displayed slots is just from back in the olden days when you had fewer traits to choose from.
Not sure if they'll fit on the screen if you go absolutely bonkers, though, but they will all be active.