Fair enough, the opinion that 400 million is not particularly impressive under the circumstances is subjective. However, the relative flattening of Windows 10 market share and the shift in the distribution of where Microsoft is making its money seem to be widely corroborated including by Microsoft's own public statements.

Download a media player that plays DVDs. It's not hard.

I think you may have picked up on the tiniest possible detail to dispute there, while missing the multiple elephants in the room that I had mentioned just before...

That was the only simple way to be helpful, if you actually needed it.

The rest is just your opinion.