As a designer "artist of such" ;), I frequently view provided to client Pdf's of my work. Last minute scans, tweaking (typically layered AI to pdf files w/outlines are created, I know "source file" but I am okay with moving forward with the shared file, so to open it directly would be turnkey for some of my minor adjusting and work. Even an open with where I search down my source if preferred, keeps me within the family of products (there could be hierarchy issues with the OS I would imagine though. I am slightly aware, chose a different road.

If this is already a functionality in some other menu area, my apologies. I can't get through the wrong searches for the right answer(s), or good one at the least. Again, I can easily open with from the program of choice. I can get buried in pDF's though.