I have used it as an intermediary between lightning and OC to empty channels from lightning and accumulate a big enough utxo before sending to OC. Found it useful last year when fees were above 500s/vb.

It was weird. As soon as the fees spiked almost all my channels were force closed so I was stuck with a couple tiny LN channels for the high fee months. Now that the fees dropped I opened big LN channels again so I think I would only need it if my peers decide to force close again for some reason.

I can see utility in a high fee environment