Have Characters that Depict Electronic Components been Discussed?

[Martin Vahi]

Thank You all for the answers, useful references and interesting
history, but while reading Your nice answers that seem to revolve around
the idea that Unicode is meant to be a standard for only a kind of
text that people once wrote on paper, not for "2D drawing hacks" like
ASCII art and diagrams, I devilishly stumbled upon the idea that plain
text in computers has always been used for more than just classical
literature. An example that nobody reads as written form of a human
language, is an interactive progress bar that consists of dots like

     |0%........         100%|

or even a "teletype compatible" progress bar analogue like

     0%
     1%
     2%
     3%
     4%
     5%
     (and so on till 100%)

Aren't such use cases LEGAL USE CASES for text in computers?

I know that I sound a bit like a troll by asking such questions, but
really, if text is being used for a lot of novel "hacks" like the ASCII
art and progress bar in computers and it would be quite cheap from spent
code points amount point of view to define some small set of special
characters for doing almost arbitrary 2D drawing, then what's the harm
of defining that small set of such "sprite role" characters, specially
if there are already so many characters defined in Unicode? With
such solution there might not be a need for many new characters in
the future, because they might be drawn as combination of existing
characters.

For example, if a monospace character area is divided to 16 pixel
rows and 8 pixel columns and each character of that drawing character
set fills exactly one of those pixels, then there would be exactly
16*8=128 such one pixel depicting characters. Those 128 characters
could be visually used on top of each other just like accents are
rendered on top of a letter. What's the harm to the Unicode standard by
defining such special characters? It would also solve the issue with
font files, because a set of installed font files will never be able
to contain fonts for absolutely all modern Unicode code points without
being constantly updated, but fonts for those 128 characters could be
installed once and then a "legacy computer" that has fonts for those 128
characters can still draw/render "email from the future" with "future
characters" if the future email standard says that a sending email
client can embed font file analogues for those "future characters" in
the form of strings that consist of some combination of those 128 2D
drawing characters? It's a 2D hack, but it can make plain text based
software more future-proof and ideologically the 2D drawing characters
are at the same category with the interactive text console progress bar:
not usable in paper books and probably hard to pronounce in any human
language.

Thank You for Your answers and thank You for reading my letter(s).

Sincerely Yours,
Martin.Vahi at softf1.com