The part I hate is how many overconfident internet technicians will be like "well ackshually the metaphor isn't that far off" completely missing the very important difference between an information channel and a power channel and what the capacity limits are for each.
For example, free space is a pretty great information channel, but it absolutely sucks for reliably transmitting fluids.
Test driven development means you write the test case first and then never write any additional tests.