What are your thoughts on RGB smart contracts system operating the Lightning layer?

Below are some bullet points on the web site FAQs.

• RGB is not a token protocol. Though issuance and management of highly scalable, programmable and private assets of different sort is possible with RGB, it can be applied in many indusrtied far beyond financial world.
• Works with Lightning Network
• No on-chain usage nor trackable footprint because of client-validated paradigm
• Scales independently from Bitcoin timechain
• Includes zero-knowledge & privacy built on best research-based products
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  • Mimblewhimble: Bulletproofs by Andrew Poelstra
  • Liquid: Confidential Assets by Blockstream

https://www.rgbfaq.com/faq/what-is-rgb