Oracle NetSuite is a full cloud ERP. Once a sales order exists, NetSuite owns it end to end: allocation, item fulfillment records, invoicing, revenue recognition, subsidiaries and currencies under OneWorld, and the saved searches your team lives in. Nobody who has run a NetSuite implementation doubts that part.
Shopify sits in front of it, usually for DTC and increasingly for B2B with company accounts and price lists, and a connector moves orders and inventory between the two. The order gets created in Shopify, the sync creates the NetSuite sales order, and NetSuite takes over. That flow is solid for anything a customer places themselves.
The gap is everything a customer does not place themselves. A wholesale buyer emails a PDF purchase order, or a spreadsheet export from their own system, and no part of that chain reads it. Somebody on your team opens the attachment and types it, line by line, into Shopify or straight into NetSuite. That work sits outside every NetSuite project plan, and it is what LevelOps PDF to Order removes.