Regarding exit nodes, you have to assume the worst anyways, so it should not change much.

In parallel with gea0's comment, using a Russian state-sanctioned exit node would make tracing efforts difficult-to-impossible for western government / law enforcement.

Could you explain what "state-sanctioned" means here?

Whatever xkjyeah meant when he said it.

Likely run by Russian intelligence services or their catspaws and therefore heavily monitored and logged.

US intelligence likely run their own tor nodes as well.

If I was Russian, sure. I think it’s best to always use exit nodes/proxies in geopolitically opposed countries to prevent collaboration between states. E.g. use western VPNs while in China, use Russian/Chinese tunnels in the west.