It's never appealed to me. I like to be home in a relaxed frame of mind (and confortable clothes), not be looking smart in public, during Xmas lunch. And be able to end lunch by slouching over to the armchair for a bit, before clearing up. Maybe, at my age, have a nap too. Although I've had to argue this within my family for the last few years. I don't see the appeal of spending a fortune eating out at Christmas (save for work Xmas lunch of course): you can eat out at any time of the year.