What makes the HP EliteDesk 800 G1 TWR still useful for upgrades?

Regarding the HP EliteDesk: The G1 TWR has a standard LGA 1150 cooler mount, so you can swap the CPU cooler for something quieter or more effective. It also has a spare 5.25-inch optical bay, perfect for a storage adapter or front-panel accessory — a reminder that tower cases from this era had room to breathe that modern SFF builds don’t.