I am a bit confused because AutoCAD users don´t have "None" style.
According to I have read these days, a "None" style is using the attributes of the last active style and overriding attributes.
I have done a test and if we change a text style (in the properties palette) to a "None" style and then we select another style, we can "load" all settings of the last selected style, I mean , there is no text style override setttings in the properties palette.
Thanks in advance.