The term “Full fibre” seems to have sprung up to differentiate, for example, FTTP from FTTC. Both are fairly described as “fibre broadband”, as they use fibre optics, but obviously not the same.
And in fairness, FTTP implies more fibre than FTTC, so it is right it is perceived as “better”. But is “more fibre” necessarily “full fibre”? If/when the comes when fibre extends to photonic switching, what would we then call it, maybe “even fuller fibre”?
Apols, I’m from an engineering background. In engineering, pedantry usually matters. As long as there’s copper, it ain’t all fibre.