Eh it’s not a huge deal with stable diffusion because you can inpaint. So you mask out the bad hands and generate a few dozen iterations that merge perfectly with the rest of the image. You’re bound to get something that looks good.

With SD2.1 I’d generate 100 or so images using inpainting and the “good fingers” was about 1% hit rate. If it’s up to 10% that’d be great because generating 10 images takes just a few seconds on an A100

Hands are generally a non-issue at this point. You can just inpaint them and use a negative prompt LoRA to get good hands in just a few attempts. That is, if you don't just get good enough hands right away. That happens surprisingly often.

I can't say for 1.0 but in 0.9 hands get fairly often rendered perfectly. It's not always right but it's way better than any other earlier release (where it's usually consistently wrong).