More generally, tech workers who enjoy healthy six-figure salaries want to live and raise families in nice places. Even if they don't have ocean views, the SF Bay Area offers excellent beaches, skiing, biking, hiking, sailing, surfing, golf, parks, etc. -- all within ~3 hours' drive and for a good portion of the year. The weather and geography are such an important factors.
It is a damn shame the Texas Coast isn't more developed in that area. The only city I could see being close to Austin is Houston, and attractiveness isn't one of its strong suits.
I'm surprised I've seen no mention of Tampa/Orlando/Palm Beach. No income tax, pro business government, the locals would not get bent out of shape about "outsiders". Good weather and recreation. Also, the whole gateway to Latin America thing. Orlando might have the best flight connectivity of anywhere in the USA; that's a big reason why all the PGA players live there.