system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5:Why are some letters in alphabet like G and Q have such contrasting shaped uppercase and lowercase, while letters like C and W are so similar?
gpt
New Roman Cursive!

Long before movable type was invented, scribes wrote everything by hand. Though Classical Latin was Unicode (only upper case) mideval scribes found Greek Cursive to be a way to write more quickly and avoid making costly mistakes on expensive parchment. So Western Europe acquired the capitals thousands of years before it went back to Greek to borrow its lower case cursive letters, which became our cursive letters. Most of the letters had just gotten smaller and curvier to reflect their use in cursive writing, and some had no Greek equivalent so a small version of the capital was adopted. 

But some Aa, Bb, Dd, Ee, Gg, Hh, Qq, and Rr, had just changed a lot in Greek during that time. Dd are different ways of drawing what was once a triangle, Aa rotated 90 degrees, e is a writing of E very quickly, the tail of g reflects the tail that G used to have. R became something like a 2 around this time, developing into r much later than the others. 

With the advent of movable type, it became important to standardize the letters and move away from scribe creativity or laziness. It also put the scribes out of work, so their efforts to speed up writing became less important. We developed standardized cursive with public schooling so that children could write faster, but otherwise, we've stuck with the c. 1500 letters.