When does headless Magento actually make sense?

Honest answer: about 10% of Magento stores benefit from headless. The shortlist:

• Mobile traffic > 60% AND mobile conversion lagging desktop by 30%+
• You want a real PWA (offline / add-to-homescreen / push notifications) or native iOS/Android app sharing the storefront codebase
• Multi-region with 4+ storefronts and the marketing team wants per-region content control on the frontend
• You have an in-house Node/React/Vue team already — the infra burden is acceptable

For everyone else — speed problems, conversion lifts, Lighthouse scores — Hyvä gets you 90% of the wins at 20% of the cost. We turn down 9 in 10 headless inquiries on this basis.