Pretty sure minecraft has used borderless full screen for a long time unless you go out of your way to tell it not to. Lots of platforms, services, and applications have been deprecating exclusive full screen over the past decade or so.
in this same release Minecraft removed exclusive fullscreen on MacOS, i wonder why they haven't done the same on Windows & Linux - maybe people still have uses for that stuff on those operating systems? in my experience exclusive fullscreen is Awful on MacOS
Yes, and any game that is frequently streamed or otherwise recorded is wise to. Exclusive full screen doesn’t play well with others.