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| [* black] What else changed? The 2019 MacBook's metal dome switch appears to have a slightly different color than the 2018's. | |
| - | [* black] The dome is like a Snapple bottle cap. You press down and it springs back up. Like a Snapple cap, if you press too hard or if you crack it, the cap will stop popping back up. If you press it too many times, the cap will eventually stop popping back up. |
| - | [* black] The dome must deform and pop back up reliably every time a key is pressed. If the two center prongs break off, the key will stop working. If the dome is cracked or permanently deformed, it may cause erratic behavior. |
| - | [* black] The 2019 model has a visually different color |
| + | [* black] The dome is like a Snapple bottle cap—you press down and it springs back up. Like a Snapple cap, if you press too hard, crack it, or press it too many times, the cap will eventually stop popping back up. |
| + | [* black] The dome must reliably deform and pop back up every time a key is pressed. If anything changes about the dome—if it's cracked or deformed—the key may behave erratically. Likewise, if the two center prongs break off, the key will stop working. |
| [* black] This may be a result from a different surface treatment, or a completely different material | |
| [* black] Surface treatment or alloy reformulation may strengthen the dome and prevent it from failing due to cracks, losing springiness, etc. |