Remember the watercooker that had just an on & off switch?

Then came one with an option button for 80 or 100 degrees (176 or 212, in freedoms). Never knew I needed that, but that just changed my live and I can not do without it. Reason: 80 degrees water is hot enough for my needs and saves time.

Our latest has 3 buttons, with different possiblities, beebs like a maniac when ready (an option which is not unset-able) and can do things I never knew anyone would need (like keeping it at x degrees for y minutes).

I guess it is like evolution: you experiment, keep what works and get rid of all things unfit.