As ff14 has console players, and in general supports controller - it has a limit of how many skill could fit there. Normally you can map 24 skills on the controller for a comfortable access. When the max is 50 you don’t have to worry about it yet. Then with every increase the skills need to spread out, so the upper limit won’t be reached, but new skills or smth will be still rewarded to the player as they level up.