<@U0AK3QC2V>: with respect to serialising coroutin...

# announcements

[mikehearn]

@abreslav: with respect to serialising coroutines. we are experimenting with this+quasar in my current project. our current approach to upgrades is "you don't attempt to upgrade serialised coroutines in place" i.e. you just wait for the old ones to drain out of the system and switch over to the new one gradually. not sure how well it'll work yet.