I had the chance to sit down with @Rearden 🥪🤖🍴🛩 at OP_NEXT and ask him a few questions about CSFS.
What came out of that conversation was a pretty interesting observation, that CSFS+PAIRCOMMIT would enable mass delegated introspection, or the ability to authorize a wide range of potential transactions from a single signature. This could be useful for coinjoins, bidding markets, vaults, channel factories, and other real world use cases.
This Delving post explains the concept in more detail:

Delving Bitcoin
How CSFS+PAIRCOMMIT enables mass delegated introspection
Disclaimer: This post is not an endorsement of any new opcodes. It is simply an exploration of new capabilities that could be enabled. Terminology...