An idle bit of speculation, which has probably been brought up before, but it occurred to me that MoR Voldemort, being more intelligent than his canonical counterpart, may not have seen fit to stop at a mere 7 horcruxes. Why not simply make as many as (in)humanly possible, rather than adhering to some superstitious wishy-washy stuff about "7 is a powerfully magic number"? It is almost certain that the mechanics of horcrux-construction in MoR are different from those in canon (e.g. mind-upload rather than soul-splitting), so perhaps the limit that Canon!Voldemort faced (unstable soul-fragments) is not something that would be encountered in quite the same form as MoR!Voldemort.

To provide the merest scrap of substance to my speculation, I noticed that in Chapter 53 (TSPE, Part III), Quirrell states:

“Yess,” hissed the snake, “but do not underesstimate her, sshe wass the deadliesst of warriorss.” The green head dipped in warning. “One would be wisse to fear me, boy, even were I sstarved and nine-tenthss dead..."

The bolded interests me, partly because of something Dumbledore states in Chapter 61 (TSPE, Part XI):

"...Voldemort’s final avenue is to seduce a victim and drain the life from them over a long period; in which case Voldemort would be weak compared to his former power."

Slowly draining a victim's life and being weak compared to his former power is certainly what occurred with Canon Voldemort possessing Canon Quirrell--perhaps MoR Quirrelmort benefits from a similar arrangement? If so, the adjective "starving" certainly fits.

Now, we already know that Quirrelmort likes to play ironic little games with what he says--in fact, he admits as much himself in chapter 51: The lips twitched again, and then went flat. "Then I shall skip it. Mr. Potter, you sometimes make a game of lying with truths, playing with words to conceal your meanings in plain sight. I, too, have been known to find that amusing."

To return to the point, if hypothetically describing himself as "starving" falls into the same class of ironically veiled truth-statements Quirrelmort enjoys dropping from time to time (see ch. 49: "If only You-Know-Who had lived, you might have persuaded him to teach you some of the knowledge that would have been your heritage, from one Heir of Slytherin to another," or perhaps "Tell them I ate [the dementor]"--->"I am a death-eater", or again Harry had asked why Professor Quirrell couldn’t be the one to play the part of the Dark Lord, and Professor Quirrell had pointed out that there was no plausible reason for him to be possessed by the shade of He-Who-Must-Not-Be-Named), what might be the import of "nine-tenths dead"?

My thought was simply that "nine-tenths dead" might be a clue as to the number of Horcruxes MoR!Voldemort created.