Well, they did invest in it. After the mass failure in February 2021, they passed a bunch of new regulations, and within one year, the entire grid was pretty much up to the new regulations. IIRC, like 98% of the grid was up to the new regulations within a year after that freeze. There hasn't been mass failure since then. There was a local failure this past winter in Austin due to the trees not being trimmed properly, then freezing rain caused branches to break and fall on power lines (called Arborgeddon by the locals). But there have been no state-wide failures since the new regulations have been put in place.