I've seen modern "designer" houses where there are no pendants and every room has many spots recessed into the ceiling. The hall and stairs at my sister-in-law's house probably has almost 1kW of lighting and it's not even that bright.
The recessed 50W GU10 fittings are the worst because there isn't, nor is there likely to be, an LED replacement that fits; you need a 7W or 8W LED and, because waste heat isn't radiated but stays in the chip, you need a big heatsink and hence a large lamp module. You cannae change the laws of physics, Captain. MR16 lamps, typically 20W, can be replaced with 3W LEDs and the heat is manageable within the size of the module.
Lexus use LED headlamps on their top model. They are problematic because nearly all the waste heat has to be got rid of at the back of the lamp (big heatsink) and barely any is thrown forwards as IR; so they need defrosters on the lenses for winter. FAIL. We cyclists get away with it because, again, the waste heat from a 3W LED is manageable in a small unit, and we don't ride much in snow.