Who said it has failed? The headline says the grid can "barely" keep the lights on.
As hot it it may seem now, Texas gets much hotter in June-August than it does in May, as an ironclad rule. A system that is barely working OK now will fail later in the summer. Having spent 20 years in Austin myself, I can tell you that a nuclear war will feel like a refreshing dip in the pool by comparison.
Your problem is Austin Power. The rest of the state does not necessarily have the the same issue of being served by that dumpster fire of a utility company that can't even partition their power delivery circuits such that when load shedding had to occur, they couldn't shut off power to massive empty skyscrapers to keep people trapped at home warm.
Whereas Bluebonnet had quickly implemented time-sliced multiplexing you could set your clock by within the first hours of things going nuts ensuring at least 15 minutes per hour of reliable power delivery per household per hour throughout the usage zone which increased in duration as things resolved until eventually converging on 100% uptime again.
Orderly, predictable, and as fair as circumstances allowed. Exactly what I'd expect from a Public utility in crisis mode. With a bit of layering, more than survivable, and actually a somewhat pleasant divergence from the norm.
Austin Power, on the other hand, demonstrated a woeful lack of due diligence, and network layout related incompetence from what I was given to understand. Basically setting things up such that people would have been better off moving their families into buildings downtown that couldn't be load shed because they shared priority generation branches, while residential areas went completely dark to absorb that mandated reduction.
That mismanagement was just absolutely absolutely jaw dropping.
Did your power go out for 62 hours during the winter storm in 2021? Did you read the report this past winter saying ERCOT still wasn't prepared fod a other similar storm? Did you read this latest report?
Get out of here with this head in the sand nonsense, thousands of people will die this summer if the grid has extended blackouts.