I had the exact same reaction and gave an almost identical review. I already have a spam folder. What the hell is this for? Adding a few extra clicks between me and my data. I swear, interfaces haven't improved in 15 years! Now these teams at Google and Microsoft have to keep breaking things so they can later fix them and stay employed.
I'm glad to see someone else had the same reaction as I did! Luckily, this feature is easily switched off again, though I have no idea why it got switched on in the first place.
Because they have to "innovate." Reinvent the wheel into a square, then go back to the wheel again and tell everyone about your streamlining. Everyone needs to look really busy!
Haha yeah that sounds about right :D