Context: before asking an installer/contractors to do this, want to know if it might have any safety pitfalls. I presume not, but I'm suspicious given how I can't find photos of it again.
Not sure about safety pitfalls - but without some specific input one way or another, I would be anxious about the issues I
didn't foresee.
Two things I would be wary of are:
1. On board circuit breaker. Certainly unlikely to happen in a properly loaded circuit, but if the overload breaker tripped, it would be a nuisance to get to. On the other hand, if it
did trip, you would probably want to check it out anyway.
2. Unused/exposed sockets. If laid out in a manner where dust could accumulate that could hold moisture, would it be a fire risk? Same for foreign objects (like deposits from unwelcome roof dwellers). Could it be a source of nuisance tripping of a safety switch if on a circuit with one in place? (Easily fixed by covering unused sockets - e.g. fitting plastic safety plugs.)
These are both somewhat unlikely - but then so are the events that have shaped safety standards for decades. I know I've said this before, but the things that worry me are the ones I haven't thought about.