We recently upgraded to Sitecore 9.1 from 8.1. We have an MVC application. We would eventually like to get into the Sitecore headless mode. But since rewriting the whole application is not an option, was wondering

if there is a way where we can build the new application in headless using react js but still keep the old components and pages as is?

The idea is to eventually move all components in the next year without impacting the business.

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