[pxx]

to be fair, slack not delivering messages is a very typical failure mode in my experience.

slack isn't fit for purpose. the missing messages will eventually show up but long after the negative impact has been realized.

[octo888]

It does however seem very very good at telling you a message wasn't sent/received (the past few years anyway)

I've used it full time for years and never had a "didn't you get that message?" situation in a DM