Housing in tech valley is ALWAYS in demand….Has been, always will be. Parents were there in the 80ies. I was there in 90ies-early 2000, and frankly there might be downturns when tech explodes, but something always starts up again.
“Always” is a hell of a strong word to use — remember that “Silicon Valley” has only been a thing for the past 40 years or so. Tech centers can just as easily end up growing in other cities, especially with improved communications and technology (i.e. Silicon Valley will be its own demise).