I would think Snoke’s death is directly tied to Palpatine’s reemergence. That he poses the whole “darkness rises and light to meet it” thing gives pause as to whether or not there’s a more abstract spiritual thing going on here with the force and the people who channel it.

“The force does not belong to the Jedi” but all that’s left of the force are the Jedi at the end of the OT. Vader, despite being who he was for most of his life, arrived at the same spiritual plane Yoda and Obi-Wan reside in. Palpatine in his knowledge of ‘unnatural abilities’ surely could pull off the same trick without redemption, but the effects were subdued. Paranormal Dark Side is secondary to Terrestrial Dark Side, and so Snoke makes himself known again, pulling the Skywalker lineage right into his evil abyss with a reach a dead Palpatine simply couldn’t muster.

Luke cuts himself off from the force, Leia hides her power. The light side needs to course correct; and so Rey emerges as the light of the future. Ben and Luke are none the wiser to realize that this will be an endless loop unless the precedent is destroyed, and so Ben cuts off the loop from its origin, but oops! Now the Force needs to course correct the other way, and so the nether world’s orbit shrinks such that it can reach the playing field. This would also account for why Yoda/Obi-Wan/Anakin pop in and out of existence for the most sporadic of times. And with rage and determination keeping his will alive, old Palpy is back to see how much Sith witchcraft he can ring dry to angle himself into power once again, no matter the physical form. Luminous beings are we…