NVIDIA wrote up Theia's integration of DLSS (Deep Learning Super Sampling) and RTX Global Illumination on their developer blog.
The short version: Theia replaced pre-baked lighting with fully dynamic, real-time ray-traced illumination in their configurator builds. Testing a new lighting scenario used to take two days of rendering. Now it happens live. Clients can swap materials and change lighting during a review session without anyone waiting on a render queue.
The bigger win was in design reviews. Lighting decisions that used to happen after the meeting, once renders came back, now happen in the room while everyone is still there. That workflow has since carried over into most of Theia's visualization work.