I subscribed briefly last year to Swift's site, to see what her syndet formulas are like nowdays; they're radically different from what she was promoting 10-12 years ago, and are now far too harsh for me. It seems like she's trying to follow a trend? And some of her advice & suggestions now just didn't make sense.That’s understandable. I make stuff for myself and a few friends. I have made bars from recipes I found on Swift Crafty Monkey, Humblebee and Me, DIY Bath and Body. All very reputable people. My hair hated all of them. After a lot of research and experimenting I came up with something usable. I’m still experimenting.
Experimenting for yourself is always smart.