Please correct me if I misunderstood but I thought ERCOT is the long-haul transmission provider and they then hand off to distribution grid operators at the cit

Please correct me if I misunderstood but I thought ERCOT is the long-haul transmission provider and they then hand off to distribution grid operators at the city/community level. The issues after the hurricane are certainly with the local distribution operators but during the winter blackout a few years back that was on ERCOT not managing supply to the Texas grid properly (as well as some other shenanigans). My concern is that if cities like Austin grow too fast in terms of electrical demand for manufacturing then ERCOT will have its hands full routing enough juice to the load demand points unless they add more generation stations closer to the demand -- and ERCOT leadership hasn't inspired confidence in recent years.