>>/50193/
This is how I think it is.
Prigozhin is part of the establishment, Putin is dying, someone needs to step in, but Medvedev is an utter tool, so now they create a folk hero from Prigozhin, and he will inherit the crown. He can shit freely on the apparatchiks because he'll be their boss anyway.
I have no idea how right or wrong this hunch of mine is.

I think the major factor that hampers the Russian advance is the same what stalls the Ukrainian "spring" (counter-)offensive. The mud.