I don't think it's so much a corporate culture thing as a context thing. There are certainly channels in my work Slack that I feel compelled to add more kindnes

I don't think it's so much a corporate culture thing as a context thing. There are certainly channels in my work Slack that I feel compelled to add more kindness phrases to when engaging. Following your metaphor: if I were in a room with a couple hundred other people I _probably would_ say "excuse me" before shouting a question.