My brake hoses are about 1 year old; I ordered the new ones about 1 month after I bought the car.
The reason:I was shocked back in the 70s to read in an automotive book that said it was recommend that the brake hoses be changed every 5 years. At that time I was driving a 1953 Chevy pickup truck that was at the time about 22 years old with what appeared to be the origional brake hoses. A few days after reading the book I ordered new hoses all around. Brake hoses don't cost much!!!

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84 300D, 82 Volvo 244Gl Diesel