The O in SOLID stands for Open-closed principle which means that entities should be open for extension but closed for modification. With React Pluggable, we can add plugins and extend a system without modifying existing files and features.

React is inherently declarative which makes it intuitive for developers when building UI but it also makes extensibility hard.

React abstracts components very well but a feature may have more than just components. React Pluggable pushes you to a feature mindset instead of a component mindset.