> you can train toward performing better in live coding interviews.

I have no doubt that you can. But how much time do I want to waste on this kind of training? Personally, I don't need to do these kinds of interviews anymore because I decided I could retire instead. I suppose if I were in my 20s, 30s or 40s I'd have to "waste" time training to interview (and let's be honest, it could take a lot of time) - or just decide to change to another industry.