Wide angle lens- several years ago, DH gifted me with a speedy little lens intended for wide angle photography. The thing is so flat that I can actually keep it on the camera body when putting it in my bag. Some people even refer to them as pancake lenses because of their flatness. I have used it as intended but it turns out it’s also really good for group photos. I used it exclusively during photos with Santa the other week.
Lifting shoes- as much as I love my Brooks joggers (just went on sale the new iteration is coming out in February), flat bottom athletic shoes are best for lifting. So some of my fashionable “lifestyle” shoes now can be better justified due to their gym usefulness. The flat bottom adds stability which means safety as well as the ability to push harder.
Elevation- While I go out of my way to seek out the really good hills around the lakes and rivers when it comes to my daily walks, we live in a very flat area. Flat makes things like driving easier and more fuel efficient. It’s also helpful when you want to get moving again in the recovery phase after mobility related health issues.