I personally am pretty disgusted by ‘tabs in the title bar’ since really what that means is deleting the title bar. You can’t grab and move the freaking window because most of it is made out of a bunch of tabs or other widgets. I presume this is done because somebody’s research found that many people just do everything in maximized windows or the Apple “full screen mode.” As long as you don’t mind sacrificing the people who do use window managers to manage windows, likely the most sophisticated users, this seems like a great move. But I would argue it’s still stupid because I have plenty of screen real estate. Being able to read one additional line of text in my browser window or Slack conversation does literally nothing for me.