IM lets me take a second to understand someone's question, maybe run some command or look up some docs, and then get back. When answering IRL, there's always the pressure to definitively answer the question, because they went through all the effort to actually take up time together. It's hard to say, "I don't know; I'll have to dig in deeper."
And turn around time on email for questions like "Why doesn't this thing work" sounds like an easy way to get blocked for half a day.
IM everyone can get back to you as soon as it suits them without doing another “I’ll call you back” round trip.
[1] - https://wiki.mumble.info/wiki/Main_Page
Try their snapshot / rc versions. They are quite stable. Not as happy-clicky as Discord, but more more private and secure.
With instant messaging, you can usually at least do simple searches for phrases you remembered from the conversation. With recording phone calls, you need to remember the approximate date that you had the chat and then skip through one or more audio files to try and find the information you're after.
It's not great.
These days I check my email about once a week. I do almost everything business oriented over IM.
It's still a mystery to me why people so often prefer it over the traditional phone, which has better audio and reliability and doesn't force everyone to regulate their posture, get in a professional looking location, etc
Also I feel that on video chat it is way easier to interject (if the camera is set up properly) than on a audio call with multiple people.
That has not been my experience. Generally the audio suffers as the compression algorithm switches to accommodate poor network performance.
This all might be moot if you're on the same LAN, such as in the same office (that is, until you have dozens or hundreds of video chats eating up the bandwidth). But add in folks in another location and/or working remotely, and video chat is just terrible.
See the McGurk Effect: https://www.youtube.com/watch?v=G-lN8vWm3m0
Now, I'm not sure what video chat tool you're referring to, but POTS audio is awful, even the more modern stuff available for cell-to-cell isn't great unless you happen to have VoLTE - any halfway decent mic and modern audio codec will be much better.
It's not an "awkward middle ground", it's the "perfect middle ground"
Whereas if I have to wait for them to become free to talk to me, I have to keep all the context in my head, which interferes with my work, because my mind has a limited amount of "cache". Also, I now have to be on constant semi-alert waiting for the call because I don't know when they will become free. That makes it impossible to concentrate on any task too much. I am certainly not getting "into the zone" on anything.
Cognitive load is a real thing, do not waste yours or someone else's.
To me IM replaces the “I could spend an hour searching for something or just pop up at your desk and ask”. It’s better because I can, like you say, defer answering for a few minutes.
In my previous job we had Slack, with General and Random channels. The discussion often went awry in these. Later we decided to create channels per team and more or less forbidden non work related chat. This basically fixed all of our problems with lost productivity and random pokes. Since people were not constantly on chat for random reasons, they did not use it for trivial work related stuff either.
Chat has solved my life issues and I've a good paying job now without chat I really doubt I'd be able to keep a job.
And that doesn't even take into account the fact that I'm not going to answer the phone if I'm on another call already, or deep into a technical problem. An IM or email, on the other hand, let's me answer their question without having to totally disengage from my current task.
Obviously these are scenario-specific, and my work environment isn't yours. But things get tricky when our two work environments have to cross...
I agree searching history is mostly useless though, we have only ever used slack as a free service where it deletes the IMs, never missed them.
Unless they’re Finnish.
The Finns are fully comfortable with silence, I envy that trait.
IM is great; It occupies the perfect spot where the conversation is real time but the parties don't have to immediately answer. Having 30 seconds to think in between each interaction sounds trivial but it has a _massive_ impact on the quality of the interaction.