Yes, this. Quite often I start writing out complex pipelines using head/tail to test with a small dataset and then switch it out for cat when I am done to run i

Yes, this. Quite often I start writing out complex pipelines using head/tail to test with a small dataset and then switch it out for cat when I am done to run it on the full thing. And it's often not worth refactoring these things later unless you are really trying to squeeze performance out of them.