One data point: Primephonic has the entire Bonynge/LSO Rigoletto with Milnes, Pavarotti, and Sutherland, also the entire Serafin/ la Scala set. I didn’t check track for track, but it also looks like they have the entireLevine-Met recording. (Maybe that’s three data points.). So it would seem they have some opera. I would be curious to know what holes people found in their opera stock.