Old habits take a while to change. Managers and executives were used to reports and memos on paper. So when email arrived, it was very common for secretaries to print emails for their bosses to read. Even at one of my early jobs in the 1990s, changes deployed to production had to be documented in memo form, and a copy of the memo printed, along with diffs of the code changes, and filed in a filing cabinet.
We got there eventually. I'd say that for all but the oldest generation still working, printing any kind of document to hardcopy has become pretty rare, at least where I'm working.