I use a cheap rubber case for my AirPods that has a little loop for a keyring that I use to attach a Tile to [0]. It's a little bulky compared to the naked case but it has a few of advantages.
First, it allows you to say "find my AirPods" to your phone and the Siri shortcut will launch the tile app and ring your AirPods. Second, the silicon is really grippy so it's far less likely to fall out of your pockets, and third the keychain ring means I can store it on a keyhook by the door which is my system for not loosing my keys in the first place, and usually obviates the need for the Tile:)
I do agree that having the UWB transmitter built into the case would be better provided it doesn't require the case having charge to work, which isn't always going to be true.
First, it allows you to say "find my AirPods" to your phone and the Siri shortcut will launch the tile app and ring your AirPods. Second, the silicon is really grippy so it's far less likely to fall out of your pockets, and third the keychain ring means I can store it on a keyhook by the door which is my system for not loosing my keys in the first place, and usually obviates the need for the Tile:)
I do agree that having the UWB transmitter built into the case would be better provided it doesn't require the case having charge to work, which isn't always going to be true.
[0] https://imgur.com/a/xTGpTOC