A 58-year-old man on ICU has KDIGO Stage 2 AKI following cardiac surgery. He is haemodynamically stable without vasopressors. The team considers the timing of renal replacement therapy initiation. His potassium is 5.5 mmol/L, pH 7.28, HCO3 17 mmol/L, urea 28 mmol/L, and creatinine 310 µmol/L. He is passing 25 mL/hr of urine. Which of the following best reflects current evidence on RRT timing?