> This is a similar case. I am -1 for this optimization.

Yeah, I concur. One of the major drawbacks of this is that the normal case where this happens involves a Load():

z = "something"
x = ["a", *z, "b"]

I see almost no reason to nest the literals in this case, especially in a context sensitive scope. I am closing the draft PR and the issue.

Thanks Patrick for the proposal, though!