L400 Mini-ITX PC Case - 12.1L SFF High Airflow Gaming Chassis, Vertical GPU Mount 350mm, ATX Power Supply Support, Max. Triple 140mm Fans, PCIe 4.0 Riser & DP 1.4 Cable Included, Black

True, but I don't know of a single system that is small enough to fit under a TV. Even that 16L HP probably wouldn't fit. my Shiny Snake L400 14L tower won't fit either. probably the only case that I can think of that is readily available and could fit a reasonable system is the Fractal Ridge, which is slightly bigger than a PS5. HTPC-style SFF has always had massive tradeoffs for the form factor.