"No, in the 19th century the case for determinism was much stronger than today."

See, that's the thing. I think that a lot of people think of the world as possessing a false dichotomy: We either have a determined universe or we have free will. The problem is, that's not obviously true. I can freely make an array of choices I'll gladly call my own, whether or not these choices are determined or predictable.

Honestly, as I think about it, stochasticism (or whatever it's called; at any rate, what you seem to be pushing) appears to be a greater argument against free choice than determinism can ever be - not because our choices are predictable, but because if every event is in fact random, then we cannot predict ourselves the choices we will make for ourselves. Given perfect knowledge of myself, I should very much want to know how I'd act in any given situation. But if there's a randomness to every action, I can't actually know how I'd act in any given situation. Thus, I can't know if my actions are also my own choices, or are grounded in a randomness external to my choice-making processes.