As far as I can say, for the papers published nowadays, there is usually a possibility to get an electronic version of the paper. (Often it requires payment or institutional subscription, but many publishers offer the papers free of charge for older issues.)
Are there still journals, which do not offer possibility to get electronic version of the paper online and use paper version as the only way of distribution of their journal? If yes, is it the case only for small publishers? Are there differences between various disciplines? (I have experience mostly with mathematics.)