There's a flip side, too. Access to power from other grids when the Texas grid is short of power will prevent blackouts and increase the reliability of the grid. Like when those recent winter ice storms led to blackouts in Texas--if spare capacity from, say, California could've been shunted to Texas, those blackouts might have been preventable.

Actually, from what I've read, Texas could be heading for a power shortage in just a few years. New regulations will require Texas power plants to be upgraded but electricity rates are quite low now so the upgrades may not make financial sense and the utilities would rather shut those gas-fired plants down. Eventually, supply and demand will raise rates enough to make those upgrades worthwhile, but in the meantime, Texans may suffer with barely enough capacity and perhaps more blackouts.