asynchronous shaders questions

[DolphinPC]

In the Ishiikura builds there's support for that (unofficial builds). While they have problems, they significantly reduce stuttering in the metroid prime series (or other games that has shader caching stuttering). I'm not an expert, but it seems that if the dolphin team will implent them and imrpove their compatibility and fix the issues, then maybe there will finally be a fix for the stuttering issues in the metroid prime series. If that's not the case, what prevent it from happenning?