On a serious note, I believe the above post to be right on the money.
However, on the humorous side my response would be....
" At least once a year...." ......
If you knew me well enough then you would find that a typical response.
Again, seriously, there are many bows on the market today that will shoot quieter, faster and with less recoil and vibration than what you are currently shooting. There are also many bows that are more convenient to carry through the woods while still being able to produce very good levels of accuracy.
Only you can really decide on this one.