Rumor has it that the Russian elite is (finally) getting uneasy about this war.
Allegedly the reason is the failure of Russia protecting their oil industry, which Russia is economically dependent upon.
But more than that many (allegedly) are now thinking that if Russia can't protect the oil industry, it won't be able to protect Kremlin either.
Admittedly this info is from a Ukrainian and Ukraine friendly source. So it may be a bit hyped.
IMO the entire video is worth watching, but here it is with a time stamp to the elite beginning to worry:
https://youtu.be/zNkjHNxV7tI?t=317