People should have mandatory lessons in vector processing.

In canteen, after lunch, there were 4 places you could place your trays. But only small, one-way corridor, for one person at a time to get there.

Every person picked the first place and while they were placing the tray, people behind them had to wait. Huge line started to form. If they, instead, always picked the last empty place, all tray places would be occupied for longer and the processing speed could increase almost 4 times.
Textbook vector processing example.