reword historical note

As title

README.md

@@ -18,9 +18,11 @@ Note: The project was previously known as `numba-rvsdg` and was renamed to
 `numba-scfg` in early 2025. The original scope was to implement Regional Value
 State Dependence Graphs (RVSDG), where SCFGs are necessary intermediary for the
 transformation from Python to RVSDG. But over time it became evident that the
-full RVSDG representation wasn't needed and so this package implements the SCFG
-transformations. Thus, the decision was taken to rename the package such that
-it better describes what it is about.
+full RVSDG representation was not as important as initially anticipated and so
+this package implements only the SCFG transformations. Thus, the decision was
+taken to rename the package such that it better describes what it is about. Th
+SCFG transformation are important enough in their own right to warrant a
+separate package.
 
 ## Development