> This is one of those features where the benefits seem to very obviously outweigh the drawbacks

That has never been true. Neither for pro- nor casual users. This might be good for the bottom line of Apple, but I doubt that too, since they squander their reputation. This is non-engineers calling the shots, just like Jobs warned us about.

I do run quite a few unsigned apps and I don't even use a mac that often. This is just stupid...