China does: all of the above, where it makes sense.

Renewables and batteries to keep your AC, workplace EV charger, stove, pool heater and (since recently) green ammonia producer going, nuclear to prevent e.g. aluminium smelters from seizing up.

Also the cheapest way to make renewables work 24/7 is to build HVDC lines - they cost as much as a highway per unit length and even undersea cables would deploy for less and faster than equivalent nuclear.

The total length of HVDC lines just in China is currently more than 40k km, so they've literally deployed enough of them to wrap around the globe.