Manhattan’s push toward Active makes the migration sound like an easy call. On the ground, it rarely is. This guide cuts through the marketing to lay out the real operational trade-offs — what you gain, what you lose, and what it actually costs to stay evergreen.

Inside, you’ll see where WMi and WMOS still hold their ground, what “migrating customizations” really means in a SaaS world, and a simple framework to identify where your own operation sits on the legacy-to-Active spectrum.