I don't know, I only have 200GB free space left on my 1TB SSD, on a system I bought just this year, and that's after I pushed all less-frequently played games etc. to the data grave HDD xD
I seriously consider getting a second SSD... that would certainly help my storage woes, lol.
Programs nowadays, be it games or otherwise, can get really big. I also use my machine for CAD and GIS frequently both privately and for work, and they eat a lot of space even with data and projects saved to the D-drive.
Still, I think this is the right direction. SSDs are getting ever cheaper, and for most people, 500GB will be enough. Like my dad, who is using that in his laptop and will never get it to full. Most people aren't me is the simple truth here. So yeah, definitely support this.