The problem with this approach is that: 1) No static typing 2) Updating the logic requires migrations 3) You put the logic into the place which is the hardest

The problem with this approach is that: 1) No static typing 2) Updating the logic requires migrations 3) You put the logic into the place which is the hardest to scale and many times a single point of failure 4) Cannot compose the code effectively and general verbosity It's one of those ideas that sounds great on paper and maybe works in some smaller problems but as you go up in complexity things get worse and worse