Magic Setting

I read the blog post on the new magic setting and it seems to me that the best of both world would be to use this new magic setting (ie, No Decay) and test regularly, no? Because that way one still prove his profile on a regular basis and can see improvement on a daily basis (which in turns makes workout even more adjusted to the current fitness signature)

If not, what am I missing?

Generally you want to prove your numbers rather than have Xert predict them all the time. If the prediction ends up being high, you may not be able to get a breakthrough.