Not all jet aircraft have multiple engines.
Name one that doesn't.
Seriously, run the numbers, a gas planet will still have the bulk of its mass as helium and hydrogen. It not that close and these stars are not that hot.
We have fast sodium cooled reactors operating for decades in the old USSR land. If they were such a problem, they would have been decomissioned a long time ago.
You mean like all the RBMK reactors that are all decomissioned after the very serious flaws in its design where exposed after Chernobyl? Oh wait they still operate almost all of them still.
Russia won't even publish full accident reports and has a awful history with safety. Russia being the only place that runs them is not a point in favor. Quite the opposite.
Oh and liquid salt reactors come in Fluoride or Chloride flavors. Chloride salts are soluble. At elevated (aka operating) temperatures Fluoride salts react with water.
At the end of the day, I don't want a computer driving my car, because I enjoy driving my car. I like to keep it in third gear and hear the engine roar for a bit when I'm driving on the highway before I put in fourth. I just don't think I would get the same pleasure if a computer was driving my car.
So when the time comes, get a classic car and get it towed to the race track. Just because you want to here the roar of the motor does not mean the rest of us should put up with the shoddy, slow to react and down right poor wet computer driver.