This change simplifies how people are linked to CRM, recruitment, project, and sales team records by using the existing follower list instead of a separate member list. This reduces duplicate data, makes access and notifications more consistent, and improves related views, filters, and demo data across affected apps.

Task: https://www.odoo.com/web#id=8544&view_type=form&model=project.task&action=333&active_id=131
Pad: https://pad.odoo.com/p/r.lsWeyXtbq94wHIXr