Well Austin has a major transit problem. The traffic is unsustainable and there's no good plan to rectify it. So there is affordable housing near Austin (in Round Rock and San Marcos) but due to traffic you can lose a lot of time to commuting.
But even leaving that aside, guess what's not going to be at all reassuring to current residents of whatever city is gonna be the "next Silicon Valey" or even "next Austin"? "Oh, don't worry, rents gonna go up a LOT, but it's still gonna be affordable for MOST PEOPLE IN TECH. Just not most of y'all that lived here before all the techies got here."