My personal theory is because that's how Apple does it and people absolutely love it. Also people love "new shiny" things. So you're spot on: Marketing. You

My personal theory is because that's how Apple does it and people absolutely love it. Also people love "new shiny" things. So you're spot on: Marketing. You gotta go w the Zeitgeist. If in 20 years sharp corners will be the new shiny thing again you bet Windows 14 will go back to using those.