It can work. My current company uses a rule system to represent most of our business logic since it is so dynamic. The downside is that we have to rebuild the entire graph into memory (times the number of threads, times the number of app servers) every time anything changes (which is constant).
Facebook wrote about rebuilding a similar system in Haskell that only changes memory incrementally, so it's definitely possible to do better.
Facebook wrote about rebuilding a similar system in Haskell that only changes memory incrementally, so it's definitely possible to do better.