OverStrike control character

[James Kass]

A font could be designed to make appropriate glyph substitutions for 
strings which include the control picture for backspace, U+2408 (“␈”).  
So a font could substitute an over struck l-m glyph for the string “l” + 
“␈” + “m”.  If the font didn’t support that string, the default display 
would still show authorial intent.  In this way users desiring to 
exchange data in plain-text which included over-strikes could do so 
without any additions to TUS.

Unicode, excluding emoji, eschews encoding items just because they sound 
cool and somebody might use them.

But if users want to band together and establish conventions, there’s 
nothing holding them back.