I think that it's a bit of a reach there to blame 3rd century Latin for why computer/telegraphy people 16/17 centuries later decided to not retain the idea of l

I think that it's a bit of a reach there to blame 3rd century Latin for why computer/telegraphy people 16/17 centuries later decided to not retain the idea of lower case, when by that point it had been around in writing since the 10th century.