You mean you operate them like Microsoft's failed submerged data center project [1]. When pointing at validating past examples you are generally supposed to point at successes.
I wouldn't exactly call this a success, for that matter.
If, like, sea-water entered and corroded the system and it blew up and ate babies, and caused Godzilla, that would be a failure. It just being not quite interesting enough to go after seems... I mean I guess it is, but on a "meh" level.