95% of the time I don't need the extra room provided by the 22" high cap, but this weekend it came in handy. I had a 9lb pork shoulder on the main grate, a second 9lb should above it on the upper grate, and a 4lb chuck roast on the upper grate. I like stacking the shoulders so that I can use a smaller drip pan, which allows better convection and burns less charcoal. The upper one also bastes the lower one.
After a few hours I was able to put the chuck roast into a Corning dish to braise on the upper rack. The Corning lid just barely tapped the lid of the grill. I moved it a half inch closer to the center and it shut fine.
I understand this is sort of a rare scenario, but it was nice to have the flexibility to perform this cook. I'm glad to hear the 22" will remain in the lineup as a table top and special order standing.