So...Real Digitalization wasn't the first time we heard this idea in Jyotaro Amagi but rather to Dominique de Mirabeau herself too. But the only difference to the two is that she (de Mirabeau) was trying to save earth's environment by using the idea of ceasing human activities through a power that later evolved into a viral plan (of using Aura [The Origin] as the vessel)...while to Amagi, all he wanted is preserve and to make humans immortal through his plan of controling Aura to real digitalized lots of people that is known as the Immortal Dusk (in Link, this work was continued by an AI named Geist).
Who knows, probably she was the perpetrator of Emma Wielant's death by a car accident...and she was using Harald to create a power in a form of an Ultimate AI and using Fragment as a test field while The World is a trial to test the emotions and pain of Aura (de Mirabeau might had been scared to Morganna's rebelling her own purpose that almost halted her devious plans [Morganna stops Aura's growth by Tsukasa in SIGN])...
While Amagi's plan of Immortal Dusk was being watched by de Mirabeau herself the whole time!
In Thanatos Report in Versus, de Mirabeau is very much much old but for a few, she was declared as an eco-terrorist (since her plan to cease human activities is just making more problems to the planet) and she was sentence to home prison in Texas. And she knew about the event of Amagi's Immortal Dusk...That's why in Thanatos Report, she had reference that cataclysmic event when she was talking to Dave from NAB.