PIP-A versus Jaguar XJ starting in blizzard

I had an interesting conversation at dinner last night with the owner of a new Jaguar XJ, I drive a 2012 PIP-A. During the recent 3 day blizzard in Buffalo (morning temps below zero and single digit highs, 40 mph sustained winds, blowing and drifting snow, etc.) my PIP started perfectly and had no problems while on day 3 of the blizzard the Jaguar would not start and spent a full day at the dealer being repaired.

The two of us (average age 83) live in the same retirement complex in similar houses and use our cars in very similar ways. Most of our trips are about 1/4 mile long - to the dining room, mailbox, meeting rooms, etc. with "long" 2 mile trips to the grocery store several times a week. Then, once a month or so we take long trips to visit grandchildren, etc., but not in the time period discussed here.

It turns out that the problem with pussy cat (as the Jag is known) was not the battery but that the exhaust system was completely blocked with ice such that the back pressure was too high for the car to start. After the dealer removed long cylinders of solid ice from the exhaust pipes, the car started fine. So the question is what should the owner do to prevent this in the future. Moving to Florida or buying a Prius are not under consideration. His suggestion is to run the car for at least 20 minutes on every trip regardless of how long the trip is, to let it warm up. This should do wonders for his gas mileage!

Our PIP does not have this problem because we used it in EV mode through the entire blizzard. Maybe I'll just offer him a ride when pussy cat is indisposed.