Puha talked about the 60FPS performance mode for Alan Wake 2 on Xbox Series X and why he's super impressed by it (but still prefers playing at 30FPS)
Honestly, I don't put much stake in any person's statements if they say they prefer playing any game at 30fps.
Yes the Series S is less powerful, but developers keep complaining and it often sounds like they just don't know how to optimize their content, or they are too rigid in deciding on what to compromise on. Nobody with a Series S expects it to play games that look like they do on Series X, just like a person with an Intel HD540 integrated graphics doesn't expect the same graphical quality as someone with an RTX 4090.