Migration OS → AC, how complex, how much?
Less complex than a re-platform, more involved than a routine upgrade. Same database schema, vast majority of code carries over unchanged. What actually happens:
- License + Cloud activation, week 1.
- Extension audit: identify which OS-only extensions duplicate AC native modules (often 4-8 of them). Plan to remove or replace, 1-2 weeks.
- Schema reconcile: AC ships extra DB tables for staging / GiftCard / Rma / CustomerSegment. Setup:upgrade handles most; expect 1-2 days of edge cases.
- B2B re-platform: if you had OS B2B extensions, migrate data into Magento_Company tables, 1-3 weeks depending on volume.
- Page Builder content: existing CMS content stays as legacy WYSIWYG; new content uses Page Builder. No mass migration needed.
- Regression QA + cutover, 2 weeks.
Total: $30-100k all-in depending on customisation depth and extension count. 6-10 week project for a typical $10-30M store.