A few things no one considers:

Population growth in Texas still rises year over year, with corresponding demands on the grid. Every year just about, we see a new record for power usage.

Renewables are much harder to manage than fossil plants (solar and wind are not steady sources), and we have steadily increased the percentages of renewables.

The Eastern and Western interconnects have their own problems, occasionally major ones.

Lastly, this was a records-breaking summer with all the above factors in play and it is holding up so far.