One of the many nuances creeping in to everyday use which I cannot stand.
I'll give you a few more examples:
"So, I was getting on the train..."
"OK, something's not right..."
"Sorry, but I disagree with you..."
This is one thing that can't be blamed on the Millennials either. I listen to the radio a lot, mainly BBC Radio 5 and there are grown men talking that way, mainly that Nihal Arthanayake who's surely in his 40s.