r/PinballFX

I want to play Junkyard. Things are on sale right now and if I can't own a Junkyard table, I'd like to play it as a virtual table. But whenever I look into this all I see are arguments over performance and physics differences between the older (FX3) and newer (FX) versions. I keep hoping those issues will go away - but it doesn't seem they have? Can someone fill me in on that aspect? Is it safe to buy PinballFX?