It would make your installation unstable as you have modules "installed" which will perhaps not run or --worse-- run with subtle errors, but you will only know at the most unconvenient time, i.e. when you run them.
CountZero A program should be light and agile, its subroutines connected like a string of pearls. The spirit and intent of the program should be retained throughout. There should be neither too little or too much, neither needless loops nor useless variables, neither lack of structure nor overwhelming rigidity." - The Tao of Programming, 4.1 - Geoffrey James
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