Can you honestly memorize all those numbers?
allll of the ascii? nooooooo.... but if i commonly used two.. then, sure... and if i couldn't, and didn;t want to be bothered to check the character map/google, then i'd probably make a little text file of my more comonly used ones and save it to my desktop for quick reference.
of course, most poepl these days don't even know what ascii is.

but some may be aware of alt+#### does funky stuff.
Try this.
Ask some random "youngish" poepl:
A. Do they recognize the word "ascii," written or said? Probably not.
B. Do they know the symbols for either degree or section? Probably at least one or the other.
C. How do you display them in say, notepad? Probably not.
D. Do they know alt+#### does funny characters? Maybe.
