The problem with this anecdote is that you don't know who is taking Adderall and isn't talking to you about it. That is, they're taking it regularly and success

The problem with this anecdote is that you don't know who is taking Adderall and isn't talking to you about it. That is, they're taking it regularly and successfully, and it's working for them. They're leading productive lives, but wouldn't be off their medication. There are people with terrible self-care habits (sleeping; eating), and sprinkling powerful stimulants on top of those bad habits is a recipe for disaster. The way I read this comment (in contrast to your followup to hirvi74), it sounds like, extrapolating from the 3+ people you know, that everyone who has ADD (an antiquated term) takes Adderall, are drug addicts, bad employees, and poor coders to boot. There's a reason why some people with ADHD don't talk about it at work and judgements based off an uncareful reading of anecdoes like yours are why.