Earlier quoted context omitted.
Wow, okay, guess I can cross that one off my list of "ECMA-48 features nobody implements". There's still plenty left on that list, though -- including at least one escape sequence I'm fairly certain was included as a joke (SPQR).
I can think of a use case or 2. Thermal printers (for those wanting old timey unix line printing interfaces) or e-ink displays in console mode.
The joke in SPQR is the name -- https://en.wikipedia.org/wiki/SPQR
The functionality is legitimate (although I doubt anyone uses it), but the name is pure silliness -- much like the PowerPC "eieio" instruction.