Why prefix the settings `UV_CACHE_MAX_SIZE` and `UV_LOCKFILE` with `UV_` if they're new features? Makes no sense.
Would be more logical to use FYN_ prefix
Facilitates drop-in migration from uv to the new tool. So if uv adopts the feature it's "just there".
They are environment variables. I enjoy seeing from my large number of environment variables to which applications they belong to.