https://github.com/python/cpython/blob/main/InternalDocs/adaptive.md describes how specialized instructions should be a series of guards followed by simple, linear code.
Both instructions have two different paths with guards on each path. We should eliminate one of the branches.
Since the instance dictionary is almost certain to have only str keys, we should choose that path.

Linked PRs

• GH-122616: Simplify LOAD_ATTR_WITH_HINT and STORE_ATTR_WITH_HINT #122620