The D case (2917 metric) footprint is common for bulk decoupling on power entry or point-of-load outputs.
For avionics or downhole equipment that sees -55°C cold soak, the capacitance derating at low temperature is minimal for tantalum — the main concern is the voltage derating: at 125°C, a 50% voltage derating is standard practice to keep the dielectric stress within the safe operating area.
