Time spent finding a charging station; time spent waiting for charging.

Time spent going to the storage to gather study materials; time spent finding a coffee shop to study; time spent going back to the storage.

Time spent finding a bathroom.

Time spent avoiding certain people at the shelter.

Time spent finding a cheap place to eat. (Being a vegetarian is not too easy.)

Time wasted going back to the storage for forgotten items.

Etc

[Almost] nothing is convenient