[FullyFunctional]

Very off-topic but hilarious.

Back to topic: inability to distinguish O and 0 seems pretty terrifying for avionics. Related, I love SF Mono, but it's so hard to read 0000080 in small fonts (try it).

[randomcarbloke]

Yeah, very off topic, terribly sorry. My brain won't let me write 0's without strikethrough anymore.