I never worked on ASW or its replacements, but assuming they fixed the calculations in one of the newer swap curve functions I also wouldn't be surprised if some poor developer had to add a "compatibility mode" with the old calculation to avoid breaking someone's longitudinal analysis or satisfy some important user who prefers a stable calculation to a correct one.
I never worked on ASW or its replacements, but assuming they fixed the calculations in one of the newer swap curve functions I also wouldn't be surprised if some poor developer had to add a "compatibility mode" with the old calculation to avoid breaking someone's longitudinal analysis or satisfy some important user who prefers a stable calculation to a correct one.