I enjoy reading posts about timing on this forum regarding the SuperCollider. This discussions about improving the timing for hard sync (perhaps sample-accurate) between scsynth and the language have come up periodically for over a decade.
https://github.com/supercollider/supercollider/issues/2939
https://scsynth.org/t/server-clock-vs-language-clock/9135
https://scsynth.org/t/keeping-sclang-and-scsynth-in-hard-sync/5526/24
Have I missed any improvements?
Personally, I have a distrust of macOS’s syncOSCOffsetWithTimeOfDay. Situations where NTP jumps certainly exist, and the timing at which recognize and correct it is different between server and language. it results in late messages. This phenomenon does not occur often, but it does occur occasionally.