I’m blaming both: I’m blaming the humans who expect it, and the billion-dollar blob of JavaScript that enables it to be so.
Probably because Slack makes it easier to establish an "always-on" culture.
Literally any other instant messaging program would have the same effect if the culture is toxic enough to allow it.
Slack is no different other than name recognition and size.
Other instant messenger are primarly (yes, some companies probably use Whatsapp and co for work stuff) for family and friends. "always-on" is different here.
Slack is focused on business.
Seriously, what even is this comment chain getting at? If you work somewhere where always-on is a hard requirement, it doesn't matter what messaging system is used. Any place that would fire you for muting notifications would just as easily fire you for turning off email notifications.
In short: Let's stop blaming the damn tool for something that is the fault of the humans using it.