And yet again
The usual complaints of supply chain management from various bods that don't understand supply chain management, or the adage of not carrying large quantities of stock at once.
For ease of maths, let's say MS can make 20 per day and they have a value of £500. To make the 2000 ready for launch date, they'd have to start building them 100 days ago. They'd also have a gradually growing value of stock sitting in a warehouse over 3 months, waiting for launch day, with the value gradually adding up to £1,000,000. Inflate the volumes and this becomes lunacy. Same goes with Apple launches.