Merging two files can be a very delicate operation, and usually possible only if the data structure is simple, as in text files . The result of a merge of two image files might not result in an image file at all. The second developer checking in the code will need to take care with the merge, to make sure that the changes are compatible and that the merge operation does not introduce its own logic errors within the files. These problems limit the availability of automatic or semi-automatic merge operations mainly to simple text-based documents, unless a specific merge plugin is available for the file types.
I don't care what drugs people, to each their own, and I agree with allowing people the decision of what they want to do by weighing the pros and cons. With that said, you are comparing weed closely with cocaine. What the fuck? You have to be very misconceived about weed, even comparing it to alcohol, which a lot of people unfortunately do, is a pretty huge leap.
Just to clarify, the only harm weed will do to your body is if you combust it, it can cause smoker's cough and phlegm. It has never been proven to cause even cancer in your lungs. If eaten or vaped, marijuana has no proven harmful side effects (unless you consider increased appetite harmful). Studies show weed consumed daily over decades can even decrease the risk of cancer.
Sorry, just wanted to clarify that since you were trying to compare weed to cocaine, alcohol, and steroids.