Dear Software Makers

Marques Brownlee’s new video is about YouTube rolling out a feature that lets creators publish multiple variants of the same video to run A/B tests, and the many ways that fractures the shared viewing experience. He asks practical questions - will viewers know they’re in an experiment, how will comment threads line up, and what happens to linked timestamps - and warns that allowing different people to see different versions at the same time undermines the idea that everyone saw the same cultural moment. He urges creators not to use the feature, arguing that chasing optimized variants erodes the communal aspect that makes widely seen videos meaningful.

The reaction connects that concern to software-making more broadly: prioritizing metric-driven experiments over repeatable creative practice encourages trimming away play and conviction in favor of measured efficiency. The post argues that making and finishing things repeatedly, learning from outcomes, and standing by creative choices produces better work than obsessively iterating variants to chase engagement numbers. It frames the feature as a symptom of a platform insecure about its identity - copying competitors and outsourcing decisions to measurable signals - and applauds Brownlee’s plea to preserve craft and shared experience.