Small matter of programming (SMOP) might be a way of saying that a feature would be trivial to write, but is more often an ironic way of saying that someone's YANI might be a good mechanic in theory, but would be a headache to code. Examples of impractical YANIs include:
- Hallucination gradually fades back to normal vision as the player recovers.
- Woodchucks can pick up and throw wood golems.
- Mariliths can wield six weapons and wear six rings. Ettins can wear two helmets, two amulets, and so forth.
- Rays and Projectiles can be fired at an arbitrary target square, not just vertically, horizontally and diagonally.