Your Shopify integration works great. Until it doesn't. At 1,000 records a day, a simple loop with API calls is fine. At 500,000 records a day, that same loop becomes an eight-hour backlog, a wall of 429 errors, and inventory numbers nobody trusts. I work on enterprise Shopify integrations, and the pattern is always the same. Teams don't fail because their code is bad. They fail because they scale a small-volume design instead of switching to a high-volume one. These are two different arch...