I also wanted to mention that up until summer 2016 people would set up really complex structures with as many as 30 different modes to try and capture all kinds of different events like who was home and who was away when there are multiple people in a household, and if it was a holiday and if the kid was sick and all kinds of complications. Modes were used for this because it was one of the only ways that the account holder could store information to create stacked conditionals (if a then B unless C but only if D).
However, now that webcore is available, most people find that they can use many fewer modes than they used to because they can do all of that if/then/else logic just in Webcore itself. They don’t need a mode to store the value.
So now modes are being used much more as they were originally envisioned, just for those big brushstroke situations that are much more logical to use and remember. 