Holy cow. I didn't realize physical copies of games were such a big deal for so many people still. Personally, I don't remember buying a physical copy of a game since 2010.
Also, like every news post on here about Google Stadia, there's a flood of negativity around it along with wishes of it failing. The fact of the matter is, whether or not Stadia succeeds, this is the future of gaming.
I would say within 10 years at the least in 15 years at the most there will no longer be such a thing as a gaming console, you will be able to play any game on any device anywhere, and I think that's Stadia's end goal.
Wishing for an innovation like this to fail is counterproductive and pointless. This change is inevitable. It probably won't happen as soon as Google would like, but it will happen.