I completely understand the position of the person you replied to. One video outlining it is here: https://www.youtube.com/watch?v=Q3XuFr7rw84 . Many people disagree with it but I think thats because they don't imagine being productive without auto-completion.

> If I were a boss of a company and saw one of my employees do this, I would seriously reconsider their employment. Purposely limiting yourself has no place in development.

If I was a boss of a company I would try to judge people based on some objective measure, rather than subjective opinions about how one should be doing things.