Over 40% of you would stop playing modern games, if there is no retail version? Yeah, right!
A lot of you would cave in, when the new game of your favorite series gets release. Most of the rest would cave in, when 3 - 5 new games of your favorite series are only available as digital versions.
I would stop buying modern games, if they are digital only I'm not paying a penny for them, but if there are ways to play them for free then I will.