Macro drivers shaping the market forecast include an intensifying competitive landscape with late-stage gene-therapy candidates (e.g., 4D-310, FLT190) that could reset treatment paradigms by delivering one-and-done functional correction, tightening pharmacovigilance demands on ERT immunogenicity, and persistent global supply-chain constraints on therapeutic-grade enzymes. North America remains the largest revenue contributor, capturing roughly 55% of 2025 sales through favorable HTA frameworks and high treatment retention, while Asia-Pacific is the fastest-growing region (>9% CAGR) propelled by improving diagnostic rates in Japan, South Korea, and China. Over the 2026–2033 horizon, continued industry expansion will hinge on Sanofi’s capacity-expansion CapEx, real-world evidence generation for long-term organ protection, and successful label harmonization across emerging markets.