Yes, the set of people truly operating "at scale" is more than FAANG and far, far less than the set of people believing they operate "at scale". This means there are still people in that middle ground.
One gotcha here is not all PBs are equal. My field also is a case where multi-PB datastores are common. However for the most part those data sit at rest in S3 or similar. They'll occasionally be pulled in chunks of a couple TB at most. But when you talk to people they'll flash their "do you know how big our storage budget is?" badge at the drop of a hat. It gets used to explain all sorts of compute patterns. Meanwhile, all they need is a large S3 footprint and a machine with a reasonable amount of RAM.
One gotcha here is not all PBs are equal. My field also is a case where multi-PB datastores are common. However for the most part those data sit at rest in S3 or similar. They'll occasionally be pulled in chunks of a couple TB at most. But when you talk to people they'll flash their "do you know how big our storage budget is?" badge at the drop of a hat. It gets used to explain all sorts of compute patterns. Meanwhile, all they need is a large S3 footprint and a machine with a reasonable amount of RAM.