There is some support for expanding the capacity of the asynchronous DC interconnects, though, which would let Texas import & export more electricity to the other two grids without tying itself to them directly. It already does a modest amount of that, but the current DC links don't have very high capacity.
[1] https://en.wikipedia.org/wiki/Northeast_blackout_of_2003
[2] https://www.nwcouncil.org/reports/columbia-river-history/bla...
[3] https://www.vox.com/2014/4/14/5604992/us-power-grid-vulnerab...
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.