A 26-year-old male farmer presents with low-grade fever, poor appetite, and weight loss for 6 months. Physical exam: mild anemic appearance, spleen palpable 3 cm below the umbilicus with right edge extending 2 cm past the midline. Laboratory tests: Hb 90g/L, WBC 262×10<sup>9</sup>/L, PLT 460×10<sup>9</sup>/L, neutrophil alkaline phosphatase (NAP) positivity rate 0.06 (6%), score 8. Bone marrow smear findings are consistent with chronic myeloid leukemia (CML), and cytogenetics shows Ph(+). Which of the following statements about prognosis in this case is INCORRECT?