Microsoft ships new behaviour switched off for a while. Feature Management is where you turn it on, in a sandbox first.
Tell Me: Feature Management. The list shows every optional feature in the current version, whether it is enabled, when it becomes mandatory, and a Learn more link. Enable in a sandbox, test the process it touches, then enable in production when ready. Some are one-way (they change data shape); the page says so. Keep an eye on the "becomes mandatory" column across the release waves; the release wave checklist has it as a step, and the release tracker on our site shows what is coming.
