I think the center of the conversation is "general purpose safety" (a term I just made up), i.e. if you just want to get things done, how to write thr code in a safe way. If your other needs like performance are critical, things need to be looked at differently.

Which is why the video I linked is not so relevant to HFT guys, for example. (Context: some people try to use HFT as "counter example" to that video.) Let's be realistic -- nobody cares about whether your code running trading algorithms inside your company is memory safe.