This backend outage reveals how horrible the Slack UI is implemented. You post a message.... you think it got sent. Then 1min later, it tells you it was not.
You can tell it was built for Silicon Valley. The marginally lighter gray tone on unsent messages is only noticeable by design-aware people on fancy IPS monitors. Messages are reordered semi-randomly.
Recently i've realized that this actually introduces more typos -- where a large number of phrases are duplicated or corrected typos reapplied.
There's something wrong with slacks operational transform or CRDT implementation or whatever they use to get edited messages to converge