Great idea rHebKo. People differ and I (for instance) never use the command-line and use an iterative development cycle to driver my research (yup, not production). In such cycle, the progressive render mode is awesome: I can start the render, go for lunch, talk to colleague about a new idea/concept, and hit ESC when I get back to review the result for the next iteration. I do miss all the post-processing steps like composite/denoise. But there are challenges too: how to share rendering time between the various view layers, and how to define when to proceed to the next animation frame?