Of course it’s a huge problem. They relied way too much on wind, and their valves froze over on natural gas pipelines. Those were issues at the generation sites, not the grid.If they can't produce and deliver it is a huge problem and you carry on about the grid that failed.They screwed their own goose.Over State lines in 48 States is national to me. They could have gotten juice from Nevada like CA does.There is no “national grid”.Not being on the national grid has it's consequences.
The US has regional power grids, which operate independently. In most cases yes they bleed over state lines because many of the power sources are dams on rivers that divide states. Texas just happens to be so big it has an entire regional power grid within it, but it also has three other grids shared with other states.
Maybe so, but it has nothing to do with them having their own grid, which is actually connected to another power grid by the way.