freeRTOS task stack size is 64K on C7x. This is very high, and the customer wants to reduce it. Is there any reason for keeping it this high?

The minimum stack size required for AM62D for a new C7X freeRTOS task = 32 * 1024 * 4 Bytes, which is exorbitantly high compared to the minimum stack size required on AM275 = 8192 * 4 Bytes.