I came to post the same issue
The problem with any recorder is, you have to remember to record it. I don't plan to do do replay when I am simming.. When something nice or bad happens, I use the replay.
Can we set the recorder to record (without performance hit) all the time with a buffer of 80-3minutes of recording that I can always go back to. Then this would function as a subsitute. Otherwise we have lost one of the good feature in FSX.