"So sometimes Slack notifications are totally not time-sensitive [snip] , and sometimes they require an immediate action [snip] and until I’ve read the message,

"So sometimes Slack notifications are totally not time-sensitive [snip] , and sometimes they require an immediate action [snip] and until I’ve read the message, I have absolutely no idea whether it deserves my immediate attention." Isn't that the same problem with the other communications media they listed, at least with email and IRC?