Quirk Singularity Theory
My Hero Academia chapter 270, Inheritance, reveals how much power Tomura was given as he wake up. As Present Mic is dragging Dr. Kyudai Garaki away, the later mentions how his 70 year theory, called Quirk Singularity or Paranormal Singularity Theory was dismissed by society. The theory agrues that “as the generations follow one another, Quirks blend and evolve, producing stronger and more complex Quirks. However, with this increase in power, the Quirks will also become more difficult to control, since the human body doesn’t evolve quickly enough to keep up.” This theory can be seen to effect All For One. He has noted that some Quirks require more time to master than others and he rather not bother stealing them. This theory could be a explanation for the natural limitation to the All For One Quirk.
Qurik transfer and Life Force
Kyudai tells Present Mic that All For One was the only one that believed in his theory and htat he “extended his hand to him.” Grateful, Dr. Kyudai developed a reverence for All For One. That’s why he gave All For One his Life Force Quirk. Giving the user “twice the vitality of others at the cost of his athleticism,” the Quirk is the secret to both Dr. Kyudai and All For One’s longevity. Dr. Kyudai’s ability to scientifically duplicate Quirks is broken. However, it seems likely that Dr. Kyudai has lost his ability to do it after the heroes destoryed his lab. Tomura will likely be the last benificary of the process and considering that it was interruprted it (All For One) may not fuction properly.
Shigaraki awakens
I’ve been waiting for weeks for Tomura to wake up and start devastating the heroes rank. I assumed he would do it with his original Quirk and some enhancements, but now he can deliver even more damage. However, it all depends on whether his Quirk starts from zero or comes preloaded with all the Quirks All For One already stole. Its unclear how long it took All For One to steal a Quirk, but I doubt it’s instant. I’ve been preparing for some heroes to die (I think some will) but now some of them might lose their Quirks as well. I think My Hero Academia chapter 270 gave us a hint as to who might lose their Quirk first, Erasure Head.