Yes, mobile phones and internet shopping have entered and are increasingly entering the life of the average consumer. The intuitiveness and responsiveness of a web site itself contributes to the trust the user acquires by using it. It also makes it easier for users to „pay a few clicks“ to pay bills, purchase a product or order a service.
A design is responsive or intimate when, after the first few minutes of working with it, the user is already aware of what he is doing and how the system is working on his needs.
I do not think the two things can be compared, a mobile app can never be as functional as a well-built web site. The mobile app presents the most important information that is minimal for the user to use the services of the system.
Sharing information, learning each other, I think that is the fashion at least in Bulgaria. Daily courses are many, including free ones, conferences on a topic, workshops, and so on. As far as the fashion in information technology, I do not think that in the information technologies word fashion fits. Things are changing with days, hours, you can always invent something more intricate, more convenient, more innovative.
Be more open and trustworthy to everything innovative. Somewhere there are specialists who work hard for your security and convenience.