SCAME is just another one of those ersatz EMACS editors.
The purpose has been to make it look as much as possible like
EMACS on TOPS-20 and AMIS on TOPS-10 and VAX/VMS. A lot of
things are still missing, and some new facilities have been
added to make it fit in better with the UNIX philosophy.

SCAME was first implemented in 1980 on a PDP-11/70 running UNIX
v7 at the University of Linkoeping, Sweden.
https://www.acronymfinder.com/Screen-Oriented-Anti-Misery-Editor-%28SCAME%29.html claims that the name stands for
Screen Oriented Anti Misery Editor

Mentioned on https://gunkies.org/wiki/Emacs_editors

It’s similar to vi as both are modal editors with curses interfaces. However, it differs from vi in that it has the same command syntax as ed. For example, in se to escape from append mode, you’d enter a line containing a single period instead of the vi way of hitting the escape key.

se has a long history dating back to the early 1980s. Beginning in 2013, Thomas Cort undertook the task of modernizing the early code and build system to get the software working on recent POSIX operating systems. The code base was straight forward and only used facilities available 25 years prior, and as a result, with a few modifications, it runs on many modern operating systems. Thomas' primary motivation is to preserve this bit of computing history. His goals are to squash any remaining bugs and make se as portable as possible. No major new features will be added.

Mark Chu-Carroll's blog covers many subjects, including mathematics, physics and programming. In this article he describes his design of a programming language suited for an editor (think about a more readable version of TECO's language).
As of 2021-06-21, the site cannot be reached. On 2021-12-22 it is on-line again.