I've got a hunch there will be some breakthroughs when AI can visualise some of the theoretical stuff that human brains struggle with. I've tried to read and understand some of the literature as to how you get gravity from a spin 2 quantum field and why it's hard to renormalize and my it's hard to get your head around. And I think that's not just for me but also real physicists. It seems quite possible to me that there's a real breakthrough waiting there but human brains are not quite up to it.