The article doesn't bother to go deeper into this claim, but maybe someone here can explain what "the line will have a solid claim to be the first “fully digita

The article doesn't bother to go deeper into this claim, but maybe someone here can explain what "the line will have a solid claim to be the first “fully digital” railway, at least at its scale, in the world" actually means? There are various more or less advanced automatic electronic train control systems around (e.g. https://en.wikipedia.org/wiki/European_Train_Control_System https://en.wikipedia.org/wiki/European_Train_Control_System), but is it that important whether the technology is analog or digital?