I often use vim despite knowing only a few basic commands because I'm already running various commands on the remote machine in the terminal and don't want the context switch. And because connection / file path completion in TRAMP is annoyingly slow if the server is far enough.

As an extreme example, today I needed to combine parts of two files into one and decided that

  cat foo bar > foobar && mv foobar bar && vim bar

of all things will better keep me in the flow than either googling how to insert one file into another in vim or starting up TRAMP.