Agreed, but most of the eastern US grid is lacking reverse flow abilities in their protective relay design and is in danger of a cascading collapse when PV saturation reaches levels that would allow a backfeed of the grid, say on weekends when most commercial and industrial loads are shuttered.
There's been a couple of studies on this which have led to highly detailed monitoring of all grid connected PV systems in some areas and the denial of connection in some.
Just like older GFI relays in older distribution gear the utility relays are burned out by a reverse power feed and are then rendered useless and this will generally not be noticed until an overload or fault event occurs that then starts popping OCP devices upstream.
