Will my B2B custom workflows still work after migration?

Yes — Hyvä supports the full Magento B2B feature set (company accounts, requisition lists, quotes, shared catalogues, tier pricing). The work is in re-implementing custom UI on top of those features.

What needs porting:

• Company-account dashboards (custom Knockout templates → Alpine + Magewire)
• Requisition list / quick-order UIs (usually a clean refactor; the Hyvä versions are simpler)
• Custom price-tier display logic on PLP/PDP (move from KO to Alpine)
• B2B-only checkout flow tweaks (often easier in Hyvä Checkout)

B2B-heavy stores often see bigger conversion lifts after Hyvä migration than B2C ones — buyer expectations on UX have caught up to consumer-grade, and B2B Luma UX usually lags badly.