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The node_list cache tag invalidates every node view on any node change. Here is how to swap it for a per-bundle custom cache tag, rewritten for Drupal 11 (attribute-based hook classes, Drush 13).

Store a form's values with PrivateTempStore, then read them back in a controller on the next request, even for anonymous users, rewritten for Drupal 11 (Form API, autowiring, Drush 13).

Process a large set of nodes in safe chunks with the Batch API, fired from a custom Drush command so a crontab can launch it, rewritten for Drupal 11 (BatchBuilder, attribute-based Drush 13 commands).

Build a custom form with the Form API, a text field and a checkbox validated and processed with an injected messenger, rewritten for Drupal 11 (FormBase, autowiring, Drush 13).

Store a value in the configuration system with a ConfigFormBase form, then read it back from a controller, rewritten for Drupal 11 (config schema, autowiring, Drush 13).

Fill a queue from a Controller with the Queue API, then drain it with a cron QueueWorker plugin, rewritten for Drupal 11 (PHP attributes, autowiring, Drush 13).