Portions from the 2016 U.S. Houzz Kitchen Trends Study that indicate there is a great need for built-in appliance trim kits:

A large majority of homeowners are upgrading many major kitchen elements and including special built-in features, such as beverage stations.
84% upgraded their appliances
77% included a microwave
The survey was sent to registered Houzz users in the U.S., and fielded in October-November 2015. Homeowners who completed a kitchen renovation project in the past 12 months, are currently working on one or plan to start one in the next three months shared their plans and progress in our online survey.