IIRC, one of the new breweries in town (Falling Sky) has a cereal cooker as part of their German built system.
Always thought this was a worthy investment in a small brewery - cereal mashes, decoctions, turbid mashing. Maybe a sour mash vessel that wouldn't stop production and would be easier to clean?
You could even use it to adjust mash temp if something happened to your mash tun heat source, or just to boil an amount of water really quickly for cleaning, volume adjustments, etc.
Very versatile piece of equipment.