An air fryer. I was a skeptic, thinking that an air fryer is unlikely to outperform my conventional convection oven in any meaningful way.

When my pressure cooker died, I replaced it with a multi-purpose machine that also included air frying capabilities, and I gave it a try. I was pleased to discover that my prior skepticism was misplaced. It's not perfect for everything, but it heats up fast, and it really shines in a few areas (e.g., making fries, reheating fries/pizza, cooking seasoned chicken, etc).