Our Australian spec trucks run dual elements in a single housing like this.
Sometimes in remote areas where it is extremely dusty, (especially our super fine red bull dust) they will run 2 of these in series.
Modern truck turbos are under so much pressure the slightest trace of dust can be catastrophic.
The below story does not fully relate to the topic, but it sort of does
If a turbo fails, and starts passing oil, a large Diesel engine can “run away” being fuelled by the engine oil, now passing into the combustion chamber, even if someone turns the ignition off.
I’ve only ever seen it once on a 17.2L IVECO V8, with a massive central single turbo in the valley.
It was brought in for engine oil consumption issues. Right at the moment the mechanic was checking it, the turbo bushes failed.
It started to run away, and the smart leading hand stripped off his overalls, and threw them into the open air cleaner inlet.
This was a big man, and his overalls were huge, but they disappeared in a blink of an eye!
Luckily, it starved the big V8 of air, and she shut down.
Could have been very horrible, as the max engine speed of the V8 was 2200RPM.
The truck telemetry told us the engine achieved a max rev of 3200RPM.