It was funny when I came to work at clients offices with suit except a tshirt instead but still jacket.
My client came in with shorts and tshirt. We sitting next to each other was hilarious. Next time i came in with a mote casual long trousers and tshirt no jacket. My colleagues still came with suits but I stopped
In the early 10s Smartphones evolved quickly and it was worth it to upgrade every 2nd year or even every year.
This changed when the tech stagnated. But smartphone was much cheaper in the early days so financially it probably isnt much different if you are buying flagships later now.