UNIX, and other competing timesharing systems of the time, have always been remote first, with Windows catching up with Citrix, followed by RDP, and nowadays finally headless as well.
Nowadays Web frontends and SSH/cloud shell, have replaced what used to be X Windows / telnet / rsh, but the underlying workflows aren't much different than running an IDE / emacs /vi / joe /... from a UNIX development server in a 1990's office.