A lot of these are less than 8K, none of them can't handle lowercase, and I bet the majority of them will be fine with "high CP437" bytes (so other Latin languages.)
Of course, but editors written in 1970 (25 years before the Worth quote in question) often couldn't handle lowercase (and neither could early versions of Pascal) often because platform support was limited or missing.
Much of the cability of a modern tiny editor comes from the environment in which it is running, we just expect more from an editor now, and the developer expects more from their operating system.
Much of the cability of a modern tiny editor comes from the environment in which it is running, we just expect more from an editor now, and the developer expects more from their operating system.