wind and solar need firming. Currently firming capacity in US is getting scarce. It can be fixed a bit with better transmission but otherwise you need to expand it. China is expanding firm power with coal, gas and nuclear. Germany will expand gas.

Bess will not solve the firming problem. And no, if you build a multibillion datacenter you want to run it around the clock as much as possible. But yes, some datacenters don't have such requirements, but here we are talking about meta