iFixit
The new MacBook Pros are getting a new “quieter” keyboard that is also said to protect against damage from dust. Unfortunately, if you have an existing MacBook that did suffer some damage by dust, you won’t be getting this new keyboard. CNET reports that both Apple Stores and Apple Authorized Service Providers won’t be permitted to replace the old keyboards with the new one because these are considered to be exclusive to the 2018 model.
It isn’t clear why this is the case but one theory is that it just won’t fit. A teardown done by iFixit of the 13-inch model found the top case has been shaven down, which is said to make more room for the larger battery on the laptop.