Comparison of past and present tenses: The use of past and present tenses in "In the past, I don't think people were" and "These days though, it's a different story" shows the difference between past and present, adding complexity to the sentence's tense.
Conditional clause: "If a train is canceled or a bus is delayed" sets up a hypothetical scenario, explaining possible actions that may be taken under specific conditions, enhancing the sentence's practicality.
Noun phrase as subject: "The idea of having to be patient in these situations" as the subject adds depth and complexity to the sentence, showcasing the ability to express abstract concepts.
Present participle as adverbial: In "checking their emails on their phone or even attending a meeting online," the present participles "checking" and "attending" function as adverbials, illustrating various activities that may occur under specific circumstances, making the sentence more vivid and specific.