Drupal 11 Change-Record Impact Map for 10.4.x Teams

If your team is still on Drupal 10.4.x, treat Drupal 11 migration as active incident prevention, not roadmap hygiene: Drupal.org now flags 10.4.x security support as ended, and current supported lines are newer. The fastest safe path is to clear the high-impact change records first, then move to supported 10.5/10.6 and 11.x targets in one controlled sequence. The Problem Teams on 10.4.x usually underestimate three traps: Trap Why it breaks late Real impact Removed core modules/themes in 11.0 Code/config still references modules that moved out of core Composer/update failures or missing functionality after deploy Config Actions model shift Teams keep procedural assumptions while actions are pluginized Recipe/config automation drifts or fails under newer workflows Platform baseline jump PHP/composer/test stack upgrades bundled with core major CI starts failing before code deploy is attempted For Drupal CMS teams, another timing issue matters: the CMS release stream now shows 2.0.0 curren