Russia at this point could not even afford a new front with Kazakhstan.Man I wonder where are those russians claiming they could Invade Turkiye and destroy our air force within hours now I doubt these mongolian russians can even fight against our old F-4s. during 2015 they were talking a lot mongolian russians have big mouth but not a good army nor a trained air force thats why they brought Su-34s from syria .
The main point after this war regardless if russia wins :
1. It's no longer a near peer competitors for America or NATO
2. It will be in the mercy of the Chinese
3. Loss of prestige both globally and internally. Think about a giant North Korea.
I doubt Russia could replace all of the lost equipment in Ukraine and if they do, it'll take a lot of time and money. Most affected will be the air force and navy. Which means Russia could no longer play the world power any longer. Still a major power but no longer a feared major power, just look at the recent tone of Poland when addressing Russia.