I don't know, I thought thicker was better untill I got my Mud Razor. It's 3/16" and chops well for it's size.

I think the beauty of Infi, SR-101 and SR-77 is that they can make a thin blade that will handle lots of abuse.

For anything smaller than a Hell Razor, 3/16" is fine.

I have a Public defender that is ~1/4" and it's complete overkill. I like it but it's not a slicer, it's not a chopper. If I had to hack through a block of reinforced concrete it would be better than an SS4 but how often do you need to do that?

A Howling Fat is a good idea but a fatty SS4 would not impress me much.