Here's a scenario that has made me consider, in this case liquid btc.
If I am running my own lightning node, and onchain fees are getting mental high, it makes rebalancing channels or opening/closing really unfeasibly expensive. What could be a solution? Maybe I hold sats in reserve for that use case in a custodial lightning wallet......there are trust issues. I found that holding small amounts in liquid btc that I can use through boltz to swap directly into lightning on my node makes those costs simply go away. It's not ideal as there is obviously also an issue with trust involved with liquid and it may or may not be, and I suspect definitely won't be, a final perfect solution.