american ilsac oils have generally sucked, they are the ones playing catch up in reduced SAPS (for different reasons) and general performance. ACEA and API SAE 30 grade PCMOs became irreversibly separated after SL.
40 grade PCMOs have no longer been the focus for a long time but API decided to apply ca limits to SN+ which kicked out the vast majority of oils on the market. P limits of SP killed all survivors, except shell with their radically different add pack.
A3/B4 and the OEM approvals like 505/229.5/A40/LL-01/18 are all legacy oil standards and being phased out.