I understood the technical intelligentsia to be the actual engineers - the people working at FAANGs. FAANG itself are the capitalist class.
Thought this paragraph by Wells was also relevant in that regard:
"I remember the situation with regard to the technical intelligentsia several decades ago. At that time the technical intelligentsia was numerically small, but there was much to do and every engineer, technician and intellectual found his opportunity. That is why the technical intelligentsia was the least revolutionary class. Now, however, there is a superabundance of technical intellectuals, and their mentality has changed very sharply. The skilled man, who would formerly never listen to revolutionary talk, is now greatly interested in it. "
The past 20 years were a period of economic growth. By Well's logic you wouldn't expect the technical intelligentsia to have many revolutionary thoughts during that period anyway.