A place for runners.
Didn't Read the article, but when I was training for my first 50k and running with others training for even longer (100mi) distances one Thing's you start to learn is you need real food, not just 50 gu packets of sugar, and funny enough left over pizza was one of the carried good items, it's got carbs and protein and is pretty packed with calories.
You are doing everything you can to bring in calories after a while out there.
There's a memorable scene in Dean Karnazes' Ultramarathon Man (2006) where, after a first night of running through an entire weekend (for a total of 299 miles iirc), he calls in an order for a large pizza pie, an entire chocolate cake and some coffee. The delivery person brings it to him on the highway he's running, driving alongside him so he can eat and run. When I read it I couldn't imagine having that much fat swirling around in my stomach while running, but since then I've done a few ultra distances and honestly, I get the appeal.
My problem always seems to be my stomach just gets unhappy and it's hard to eat anything,
Surely you will not regret wolfing down nine slices of unrefrigerated leftover bar pizza while running 100 miles across Massachusetts, chasing your wife who is ahead of you, raiding every aid station.