Having been a senior art director for an American car magazine, it is a habit I can't break. It is more about typography than grammar.
View attachment 64020
I put a lot of time and effort into headlines. I wrote them in Adobe Illustrator, turned them into shapes, and placed ever letter one at a time. That's what publications do here.
View attachment 64021
Think of it like food styling. You put every element of your dish in place. That's how I am with type. And, it carries over into my everyday typing. I use caps in my thread titles, just as I did with my headlines.
Then again, our cars have tires, not tyres, we taste flavors, not flavours, and aluminum has four syllables.
CD
Here its same as newspapers - either all caps or only caps at the beginning of the headlines. This is an example from a quality car mag: