Discourse is heavily customizable community software, with many configurations and variations of the interface based on user permissions and other functionality. This makes it hard to predict the ways a product change might take site owners or their members by surprise, especially on sites with many customizations or bespoke themes.
This is a companion discussion topic for the original entry at https://blog.discourse.org/2026/03/how-we-built-the-upcoming-changes-system-for-gradual-product-rollouts-in-discourse