My personal anecdata is that I've never worked at a place where I couldn't trivially exfiltrate real user data and source code without being traced. This is 20 years across defense contractors, banks, insurance companies, etc.
I understand your argument and in principle I agree with it, but in my experience nobody cares all that much about the data on the primary network, so creating a second network that grants devs things like local admin doesn't seem to increase risk by much.
I understand your argument and in principle I agree with it, but in my experience nobody cares all that much about the data on the primary network, so creating a second network that grants devs things like local admin doesn't seem to increase risk by much.