The numbers in state courts may vary, but in NY they are similar to the federal system. https://www.law.umich.edu/special/exoneration/Documents/New_...
Obviously a guilty plea still requires work, and maybe a lot of it. But in terms of outcomes, they rarely lose.
Right, but this is the result of:
1. Selection bias (prosecutors only prosecute a case they have a great chance of winning).
2. Negotiation (prosecutors will charge for lesser crimes than those they believe were committed, in order to gain agreement to a plea deal).
The percentage alone doesn't tell you much about how hard it is to gain a conviction. It tells you a lot about how willing prosecutors are to prosecute a case that they may not be able to win.
(I don’t disagree with you, just adding a small point)