If events are not properly triggered back upstream (ie: adjencies stay up, bgp remains fairly stable) and you end up dumping a lot of traffic on the floor, it's sometimes a bit more dificult to diagnose than loss of light on a physical path.
On the sunny side, I see this improving over time. Software bugs will be squashed. Poorly designed networks will be reconfigured to better handle these situations.
But this happens everywhere, everyday, regardless of the underlying technology. ***** "The information transmitted is intended only for the person or entity to which it is addressed and may contain confidential, proprietary, and/or privileged material. Any review, retransmission, dissemination or other use of, or taking of any action in reliance upon, this information by persons or entities other than the intended recipient is prohibited. If you received this in error, please contact the sender and delete the material from all computers." 113