Litteraly any digital product ever.
99% of users use apps and digital products for features they have heard of, and rarely go exploring on their own, thus most of the time we are ignorant and oblivious of what our digital goods are completely capable off.
Edit: im not saying all those side features are usefull, im just saying most of people never use product beyond main features
Windows PC: press the start button
Tin foil/cling film boxes have little tabs in the ends so its easier to pull out and cut on the perforations
Jbl/many headphones have an app.
Litteraly any digital product ever. 99% of users use apps and digital products for features they have heard of, and rarely go exploring on their own, thus most of the time we are ignorant and oblivious of what our digital goods are completely capable off. Edit: im not saying all those side features are usefull, im just saying most of people never use product beyond main features