Only part of this I would quibble with: > Copying and pasting a few lines of code takes almost zero thought and no time. Find and replace are very good at find

Only part of this I would quibble with: > Copying and pasting a few lines of code takes almost zero thought and no time. Find and replace are very good at finding repeating things later if we start to care Find-and-replace is unfortunately not really adequate for finding repeated code, in my experience. There must be much better tools out there.