when the junior dev updates all npm & nuget dependencies in the project to the latest beta versions to make an impression right after joining the project...

npm update -g has undeniably a satisfactory feel to a newbie. All the loading bars and text scroll in the terminal makes you feel you are able to do something of importance. And you've been told since you were small to always to install the latest software updates because it keeps you safe.

What is the deal with it ? If the junior did not do that, you would rant on it too.