You seem pretty childish too, unable to tell the difference in an expectation and a “demand.”
Complaining about someone not using a shit heap of a productivity killer of a tool when they’ve made it clear that there are actually valid ways to communicate is a demand by definition.
It’s a demand that someone destroy their productivity to service your arbitrary bullshit.
Mental children may not understand that sending an “instant message” such as via slack is more of a demand than sending an email and expecting a response eventually.
It’s truly bizarre that you want to fight with me about this. Not only is your opinion weird, it means nothing to me since you were a rude weirdo about it. Thanks for letting me know how to interact with you in the future though.
Yeah, this person is acting like breaking their concentration on something, to read an e-mail, is drastically different than doing the same thing, for a text. This is a ridiculous assertion. Unless you intentionally make it so you have to log into your e-mail every time you want to use it, but just leave slack, or whatever, open. If you do, that is your fault, not something wrong with e-mail. You can just see e-mail notifications, and then look at the window, just like any messaging system.
This person just has an irrational, personal, dislike of e-mail vs other communication methods. They are trying to make it seem like they have some sort of objective reason for their preference, and it isn’t just a personal preference. This way they can try and force everyone around them to bend to their preferences, while telling themselves it is everyone else who is wrong. Like yeah, e-mail isn’t the greatest thing around, however it still has some aspects that it does better than anything else, especially in a professional environment. There are rational, objective, reasons most companies still use e-mail, even though they all have slack groups too.
Fragmenting communication into anti-productivity tools then expecting a response is not less demanding.
The only “rude weirdo” is the person jumping down someone’s throat for stating the fact that a “half second” is literally never a half second, and is very frequently hours of time wasted.