This is a great idea, but it obviously doesn't impact the inherent problem of enterprise nodes being subject to the whims of the companies controlling the cloud hardware

This article was also published on Bitcoin Magazine:

The team at Sphinx is using the Validating Lightning Signer architecture to separate the keys from the Lightning node using a dedicated signing device
https://bitcoinmagazine.com/technical/validating-lightning-signer-separates-nodes-keys