Ilian's answer to question 72229, involves
SetSystemOptions["CatchMachineUnderflow" -> False]
Evidently, this worked in earlier versions of Mathematica, but in version "11.3.0 for Microsoft Windows (64-bit) (March 7, 2018)", it does not, returning
SetSystemOptions::sysname: CatchMachineUnderflow is not a known SystemOption.
Does an alternative exist in the new version of Mathematica?