Knowing that Japanese courts have a conviction rate of 99.9% really enhances the experience of Ace Attorney.

On one hand, it gives you the minimum context to understand that Ace Attorney was intended as a critique of the justice system in which it takes place—the ridiculous hoops you have to jump through, the over-the-top bloodthirst of the prosecution, the blind naivete of the judge. It gives the games more thematic weight, too. Phoenix truly is an underdog pitting himself against a system he knows he has little chance against. His belief in his clients' innocence is not merely a character trait, but a revolutionary act. It also emphasizes that Phoenix truly is a force of nature, to win as many cases as he does.

On the other hand, it makes the prosecutors' pride in their "win record" absolutely hilarious, and the fact that Phoenix breaks it even more so. Imagine spending 40 years bragging about how you have a perfect record of never being struck by lightning and then some bisexual idiot six months out of grad school casts Thunderbolt on your ass