It says there is a distinction between client script deployed by form or at record-level, am still not sure even after reading this 😬. nlapiGetContext().getRemainingUsage() from developer console should be affected by all client script deployed on the record-level, or maybe the doc refers to SS2.0 only ? Maybe I am confused, but I remember that SS1.0 client scripts can overwrite and call other client script's functions, and if that's the case, it would make sense that they are be limited together.