You complain about minsinformation and then say stuff like that. HVDC is very widely deployed for interconnectors and grid connections. And there are >20 UHV

You complain about minsinformation and then say stuff like that. HVDC is very widely deployed for interconnectors and grid connections. And there are >20 UHV lines in China, many over 1,000 km long. This is not pie-in-the-sky but physics. By using appropriate technology you reduce tranmsision losses and/or cost. Also consumption and demand are already very spread out in a traditional grid. A generator can go offline and the power is sourced from another location. In fact this is essential for nuclear stations as large generators can fail rapily. I agree that pumped hydro has limited value, and nothing is a panacea on its own. But most of the nuclear states actually have significant deployed pumped hydro capacity. It is a complementary technology. When nuclear power stations fail they can leave a big hole in generating capacity. Pumped hydro can deliver >1GW in a short amount of time and fill that hole. Otherwise you need to maintain more spinning reserve.