It's just the best way of contact, if people know anything else, they can use it, but even in one building it's impossible to know who is on vacation, who is fired, who is on lunch, who is on a smoking break, who is off on an errand, who left a little earlier, who is busy at a meeting, who is just busy.

Good for you. Obviously the rest of the world uses phones and video calls, which is why this thread exists. You should give them a try sometime!

As I said even in the same building it's impossible to video call, because people aren't killing time all day long.

Obviously some people use video calls successfully. I don't know what else to say...