"Perfection is achieved, not when there is nothing more to add, but when there is nothing left to take away.” - Antoine de Saint-Exupery.
Compliance and amazing cross browser support led to a robust but heavy react-dom. React DOM Lite is an attempt to sculpt away some of the mass away and see if we can make something more low powered device friendly.
Keeping in mind the existing React ecosystem (and of course the web ecosystem too), following is the feature list to attain feature parity with the existing react-dom:
The goal is to be compatible with the react ecosystem, while remaining lite. This will likely mean that the supported browsers, will be more limited than react-dom, and attempts to polyfill differences between browsers will be limited and more tightly scoped.