I will confess that back in the day when typed on the family machine, I used a capital “I” for the number 1. It never occurred to me to use the lowercase “l
“. Fortunately, the exclamation point was not an issue!
The Stenographer (Philadelphia), July 1899 –

© 2021, Mark Adams. All rights reserved.
The Victorian snark is palpable.
Ah, the days of manually reversed ribbons.