No way would I leave my 23.5 on 24/7. I would connect those cables to something else to burn in, or, I would burn them in while listening. If you had a tubed REF 6 pre-amp brand new would you leave that on constantly for 600 hours while burning it in? I definitely wouldn't. Most people suffer to the slowing bettering sound of their new equipment while burning it in.
Also, the cables shouldn't sound bad while burning in anyway, and it is interesting to hear the sound get better over time.
My recommendation, is you are asking for trouble leaving a 23.5 on.
enjoy