I think you should keep a goal of reducing the number of information sources in your environment. You should have a primary or definitive knowledge location. It doesn’t matter what that solution is, but keeping that number low or integrated into each other so one becomes that primary source is worth considering.
If the RMM becomes that, make sure you do the leg work so you are not double entering data. Simple-Help arguably can track alot of information on it’s own if you do the leg work to make integration possible but I also use another system to track data like that.