Joe Rossignol, MacRumors:

Some customers have been hoping that Apple will start swapping out second-generation keyboards with third-generation keyboards, as part of its service program, but MacRumors has learned that isn’t the plan.

When asked if Apple Stores and Apple Authorized Service Providers will be permitted to replace second-generation keyboards on 2016 and 2017 MacBook Pro models with the new third-generation keyboards, if necessary, Apple said, no, the third-generation keyboards are exclusive to the 2018 MacBook Pro.

This isn’t terribly surprising, as the architecture of the new machines has changed and the swap-out goes way beyond simply swapping keyboards. But it is good to know.