Sure, I used it on Chrono Trigger all the time, but Chrono Trigger was perfectly designed for New Game + and most games are just copying the idea without being well designed for it. The multiple endings and the ability to fight the final boss at nearly any point on New Game + is part of what separates CT from some other games that just let you carry some stuff over into a new game. Also, the fact that CT is a fairly short game made quicker by NG+ helps. I would often just cycle through the game over and over increasing my stats on NG+. Nowadays a lot of games have bloated length and I don't really feel like playing through them multiple times. Even if NG+ makes it quicker it might not be worth it. Add to that the problem that NG+ can make a game feel boring and I might prefer replaying a regular new game over NG+. For some reason, this was never a huge problem to me with CT, but again, I think the game is just perfectly designed for it. Most games it will completely kill the fun and if you really have to fight a ton of battles anyway (which you generally don't in CT) it can become a chore. I've done it for Persona 5 too. I've got to say though, even there it kills some of the enjoyment. At least the game gives you some reason, but aside from optional bosses, Persona 5 was kind of too easy the first time through. Playing on NG+ with end game equipment and the ability to buy high level personas from my compendium (which I try to keep to a min to increase my enjoyment), just destroys even the small semblance of challenge. Then I went and cheap killed the reaper before the sixth dungeon and it won't even let me fight battles anymore if I sneak attack. To make matters worse, it still didn't really get me strong enough to take on the other optional boss.....