Billet rods and flywheels are so readily available and cheap nowadays there’s really no reason not to use them.
Harbor freight motors are cheap, little more money have a bulletproof engine.
Those of us with vintage Tecumsehs don’t have the flywheel luxury unfortunately. Billet rod is going strong though
So feel lucky that billet flywheels are even available for your engine.
If I could get a billet Tec flywheel for an Hs50, I would install one on every engine I own.
IMHO, ymmv, etc