When we examine the Evolution of UX over the years, we can divide it into 3 broad sections.
The first section is about the Design´s Paradigm. ( I promise not to be boring).
The second one is knowing and accepting that everything we do, we do with the user in the center of our decisions, and understanding that we should measure the risk of our decisions
And finally the rapid evolution of new interfaces.
Our products have evolved based in the evolution of these sections. I´ll show you this evolution in a section about Liferay Portal