A thought came to me at work today...
Usually, in a J-RPG, or any other RPG system for that matter, you start off at Level 1 and you gain levels quickly, because everything is new to you. You start increasing in strength rapidly, but as you progress through the game, time between levels starts slowing down. Maybe you got Level 2 in just a few kills, Level 3 a kill or more more, etc. By the time you get to Level 50+, you're spending an hour or more on a levelup.
It's similar for Weapon skills. Get a Lv99 character, grab a 119 weapon which you have 0 skill in and go out and start pounding on some Lv90+ enemies. The first 100 levels will come insanely fast (as long as you can hit the enemies reliably which should not be hard if you use Kuyin, sushi, etc). The second 100 levels will still be pretty swift, but around 250 or so it will slow down by a large margin.
These things reflect how the learning process works in general -- when you first start learning something new, you get much better than you were very quickly, but as you learn more, you start to learn slower because the hardest things to learn, take the longest to learn.
When you throw an American football for the first time, it is very awkward in your hands. The ball is shaped awkwardly and it probably wobbles like crazy the first time you threw it. The second time you throw it, it probably goes a bit better, doesn't it? 10 times later and you've probably taken most of the wobble out of the ball, but your aim still is lacking. An hour later, your aim has improved a lot, but you're still no quarterback. As time goes on, your learning process slows down.
.... but...
Let's look at Capacity Point gains. It's backwards. You start off learning slowly and you start learning faster as you get more job points. This makes no sense whatsoever; it SHOULD be the opposite like everything else is. Not only is this backwards, but it is ALSO unfriendly to newbies (it takes them FOREVER to get enough Job Points that their character becomes useful/desirable in groups) and those trying to start a new job.
I really don't get why they chose to do it this way, to be honest. It just seems so backwards, and it discourages people from starting over again on a new job, because they go from +20%, or +30% Capacity Bonus back to +0% and it just seems so atrociously slow....