Google scholar has become the way to search papers (which is somewhat worrisome). What people want from there is a download for all the stuff that does not list an author copy. Open access IMHO is just a reaction to the fact that mostly you would not need a subscription anyhow. Now the authors are paying upfront or universities are paying flat for all their researchers. The problem is now the incentives are not increasing the number of subscriptions but increasing the number of papers published.