Atlassian's New Typefaces Introduced

"Atlassian Mono is a derivative of JetBrains Mono which was specifically tailored for developers."

Typical Atlassian behaviour. On the other hand, JetBrains Mono is the only good (IDE) UI work JetBrains have done in the past five years, the rest being regressions. (YouTrack and TeamCity have actually improved.)