In calculating the orbit of Mercury according to QM, it becomes open [1]. This is our answer to this question. A second answer is that GR requires QM.
According to the Niels Bohr view, it is not that the universe is quantum ontologically, in its essence as Natur, but we give it an observed quantum model, and interpret it that way.
"Physics concerns what we can say about Nature," explained Niels Bohr [2]. As one of the pioneers of quantum mechanics, Bohr explained further, that "there is no quantum world. There is only an abstract quantum physical description".
In that sense, TR (topology reduction) by the author can be understood as providing the topological basis -- TR means "that a continuous path in a higher dimension must be discontinuous when projected in a lower dimension".
TR does not change Wirklichkeit (nature as we oserve it), nor Natur (nature as unkown, unseen) as divided by Kant, in German. TR just changes how we observe nature. In that sense, TR changes physics -- Niels Bohr explained -- as physics concerns what we can say about nature, and there our description changes, although the facts remain the same.
A similar situation happens with the number Pi, currently. We realize Pi as (3.141592...) is not measurable. Does it exist in nature, nonetheless?
To give a short answer, NO. The universe is a non-euclidean space, where the ratio of a circumference to its diameter must stand as the ratio of two finite integers. The value is similar, may change according to the local curvature, but the curvature is never zero and we can use use finite digits for the ratio. Rather than a particular value, the quantum becomes a rule.
This … changes GR, to a quantum basis -- what we were long waiting for -- harmonizing GR and QM.
While not changing values very much locally, the long distance predictions can become very different. For example, the orbit of Mercury becomes open, as we published [1]. The precession of Mercury is a sweep, and Mercury can escape!
And, with an open, spiraling out, orbit, Mercury can excite a sympathetic resonance with the Sun, wobbling in a growing faction, and even escape the Solar system in that growing orbit (see cosmological models). This could result in an exchange of orbital places of Venus Earth, and the extinction of life on Earth -- by the growing temperature on Earth.
This is unlikely, but now more possible. The consequences of investigating Pi -- even though Pi should not exist in nature, as an infinite precision number, thinking about it can be instructive
Regarding GR and QM, what is your qualified opinion? Have we hit all the right reasons to modify GR, as in [1]? While not changing values very much locally, the long distance predictions can become very different.
REFERENCES
[1] https://www.researchgate.net/publication/339988557_On_the_Sun's_Gravity_and_the_Topology_of_Mercury's_Orbit
[2] Petersen, A. The Philosophy of Niels Bohr. Bulletin of the Atomic Scientists, Vol. 19, No.7, 1963.