Hi,
Personal opinion only: if a mfr wants to use a plastic oil tank in a dry sump system, such that it's protected from exterior exposure to damage, go to it. But a conventional oil pan in plastic? I've scraped up a couple of metal pans, as I'm sure most of the folks here have, and paint scratches were about the extent of the damage. More adventurous friends have dented, and even punched a hole in, metal pans. Short of adding a five or ten pound skid plate to protect the plastic part which saved maybe a half pound or pound of weight to start, I'm not in favor of conventional style pans in plastic.
But I'm sure I'll be outvoted by the mfrs, who will gladly charge us more for a worse product, all in the name of saving a few ounces so their heavily advertised 500hp engine gets better fuel economy! Maybe one of those bean counters will get lost, hit a rock, ruin his plastic pan, and have to walk for help.
Rick C