[swypych]

ownership issues aside, the "magic" under the hood is not a problem assuming it actually works. Its when the magic breaks, or works in unexpected ways, then it becomes a problem. Magic is also progress, and progress is usually good.

[zerox7felf]

I think you could look at it in terms of sustainability: "magic" progress has the potential of "magically" vanishing if it's inner workings are not sound, reliant on an unreliable other, etc.