Why have both electronic and print versions available?
Some users prefer to use print.
Sometimes there may be technical problems with accessing the electronic version, so the print is needed as a back-up.
Many publishers insist that we continue to receive the printed version. Some will not allow an electronic only subscription.
A print version is ours to keep, as an archive. Many e-versions are no longer available if subscription later cancelled, or are only available in a CD format. Some are only available on a rolling basis, or some other dynamic basis.