Letting go is the hardest, but they know where their value lies and when they can add this value in the design process.
放手是最难的，但他们知道自身的价值所在，并知道何时在设计流程中加入进去。
2
Major manufacturers have long recognized the value of letting customers modify their products, a fact obvious to anyone who has ever swapped out factory-issue tires for performance treads.