I'd think 3 would've grown quicker than the other 3 cause of Austin but ig San Antonio growth hasn't been great and it underperformed in 2020. 4 is a bit deceiving cause it's mostly powered by exurban growth but that still prolly the main countershift for Rs in all this.
Anyways, this map also shows just how urban Texas as a whole is; it's just that rural areas are almost universally R whereas a lot of these metros have conservative pockets.
Edit: Oh now I see not all the districts are equal sizes that makes more sense. Still RIP to the GOP.
Pending Houston