That's certainly true. I bought my 6C with the 100 blade pack in mid to late 2018. However, most of the reviews on the Rockwell blades were meh at best. I guess that I am fortunate that my skin and beard type can take these blades without a problem. I get good shaves with VDH blades and in my opinion, I did well with them also. However, I won't revisit the VDH blades because they don't last as long. Also, they are too expensive for a 5 pack.
My goodness me, I forgot to throw Piggly Wiggly into this. It's like saying that woman ignored me. She didn't.