Which Mac models are afflicted with the "repeating keypress" issue?
These models are affected as of 2019-07-16:


MacBook (Retina, 12-­inch, Early 2015)
MacBook (Retina, 12­-inch, Early 2016)
MacBook (Retina, 12-­inch, 2017)
MacBook Air (Retina, 13-inch, 2018)
MacBook Air (Retina, 13-inch, 2019)
MacBook Pro (13­-inch, 2016, Two Thunderbolt 3 Ports)
MacBook Pro (13-­inch, 2017, Two Thunderbolt 3 Ports)
MacBook Pro (13-inch, 2019, Two Thunderbolt 3 ports)
MacBook Pro (13-­inch, 2016, Four Thunderbolt 3 Ports)
MacBook Pro (13-­inch, 2017, Four Thunderbolt 3 Ports)
MacBook Pro (15-­inch, 2016)
MacBook Pro (15-­inch, 2017)
MacBook Pro (13-inch, 2018, Four Thunderbolt 3 Ports)
MacBook Pro (15-­inch, 2018)
MacBook Pro (13-inch, 2019, Four Thunderbolt 3 Ports)
MacBook Pro (15-­inch, 2019)


Source: https://support.apple.com/keyboard-service-program-for-mac-notebooks