What happened? Tech companies became trillion dollar companies and tech founders became billionaires. As a trillion dollar company, you are a military contractor and are deeply invested in and intertwined with the American imperial project.
Tim Apple [sic], Sundar Pichai, Sergey Brin, Elon Musk, Mark Zuckerberg, Sam Altman and Jeff Bezos all went to the inauguration to bend the knee. They all paid 7 figures plus to be there.
Being a billionaire is fundamentally incompatible with being a countercultural nerd. If anything, this was Silicon Valley returning to its roots. The first companies were founded before WWI (eg Federal Telegraph Co) but the true origins of the name "Silicon Valley" came from semiconductors and the likes of HP and Lockheed Martin as a Cold War defense offshoot.