As far as I'm aware, there have been no rolling blackouts in Texas since the last major incident in winter 2011. Got a source?

No, but blackouts after storms are pretty common. Sometimes lasting for days.

IMO, that’s a big part of the reason why backup generators are so very popular here in Texas.

Certainly, that’s the reason I have seriously considered installing a 10-15KW natural gas powered backup generator. It wouldn’t be grid-tied or even grid-interactive in any way, but it wouldn’t take me long to go downstairs and throw the transfer switch.

What part of TX do you live in? My parents have lived in suburban Houston for 20 years, and their power has basically never gone out for more than short blips, not even during tropical storms or hurricanes. The power lines in their neighborhood are buried though. I imagine if you're getting frequent outages you must have above-ground lines that get downed by trees? That can be an issue, but doesn't have a whole lot to do with the state-level grid, just whether a given subdivision or city has chosen to spend the money to bury the last-mile lines or not.

California has far more rolling blackouts. When I lived in Texas, the only power outages I ever saw were during hurricanes or some random local event like a transformer going out.