It&#x27;s more helpful to think about classes of errors and what the type system prevents.<p>A simple type system prevents type mismatch errors. A more complex type system like Haskell&#x27;s might be able to encode interfaces and other rules but might also has it&#x27;s limits.<p>The trade-off is usually that the more classes of errors you remove, the more complex the type-system becomes. Over the lifetime of your program, how much time did you spend hunting bugs vs time spent in long compilations or encoding all the rules.<p>I guess my point is that a lite-weight type system might also be enough.