Having a record allows all kinds of automated followup, post analysis, etc. This level of business intelligence and actual understanding is helpful in improving organisation function and individual training long term.
Asynchronous is _a_ great next step beyond that:
Moving discussions and decisions async has been a massive improvement in the organisations I have helped. Goes against dogma and habit (with all the huge obstacles that come with it) but pays off quickly.
Discussions are more factual and evidence based.
Decisions are thought through and transparent.
Collective (and individual) memory of what has been discussed, decided, and why is much better.
Training people to be clear, succinct, transparent also help them not get bogged down in gut feeling, habit, dogma, ego, posturing, pestering, politics, etc.
And of course the immediate bonus of individually flexible scheduling and not killing efficiency by slicing everything to administration/manager-mode-time.