Running an umbrella lightning channel with 4 or 5 connections for 3 or 4 years now. Never a problem.
Discussion
How much volume and how many transactions?
Not a lot. Transaction incl. tipping, bitcoin games I play winning Sats, and moving Bitcoin around in wallets
I think there is a fair amount of channel pwning that goes on. In my opinion the Lightning network needs 10 years for adoption before it is reliable and accessible by most people. Restaurant owners usually don’t do their own backend work on POS systems. Probably a job opportunity in there somewhere.