Likely not, but definitely depends on the situation.
And how do you know the backup is not compromised?
I think it’s not as clear cut. It’s always a risk assessment and depends on context.
I have to say that I’m not a security expert, just an amateur with conceptual understanding of the topic and some opinions.
This was definitely a fuckup from Slack but as I’ve understood it, the “AI training” means that they’re able to suggest emoji reactions to messages.
Not sure how to think about this, but here’s some additional info from slack: https://slack.engineering/how-we-built-slack-ai-to-be-secure-and-private/
Edit: Just to pick main point from the article:
Slack AI principles to guide us.