Personally I’d say we owe it to the passengers to be able to fly comfortably with the AT out and/or raw data. Otherwise the first time you may have to do it may be in an emergency situation, perhaps combined with bad weather at an unfamiliar airfield.
I’m not advocating we start flying into Belfast City with everything disconnected in marginal weather conditions, but I can’t understand the philosophy of not being able to take the AT out on a CAVOK day at home base.