Corporations use extremely inefficient tools and processes but because they have a monopoly over some area of the market, they can easily survive in spite of very poor technical decisions.
What happens is that engineers who work for these companies learn a lot of bad habits and tools which slows them down; they become overly focused on risk mitigation instead of productivity.
I'm starting to think that this is intentional; corporations want their engineers to get stuck in a technological rut; that way they can't leave and start working for a startup which will disrupt them later.
Even some corporations which seem innovative, are not actually innovative at all; their entire ecosystem of tools is extremely inefficient once you step back and consider the big picture.