Email a lot of times is still the de facto standard when it comes to corporate communications, especially in large corporations. You might be able to get away w

Email a lot of times is still the de facto standard when it comes to corporate communications, especially in large corporations. You might be able to get away with MS Teams when you have less than 300 people, but when you start to get into the thousands process and efficiency start to really matter. No one has time to keep up with call the chat happening in hundreds of channels (worse they are threaded half the time now and you have to manually expand them). I would say don't over think it, I am a team lead and communicate with other organizations all the time, internal and external, 90% of the time the email is: Mr. $lastname whatever I want to write here about what I need or to answer a question. $default_email_signature_already_here A lot of time email is used for meetings to schedule in person or MS Teams meetings, exchanging files, relaying important information. Sure we have MS Teams/Slack/etc, but that is more for ad-hoc, quick communications. You are a high schooler and you will have a lot of growth when it comes to how the business world works (I know I did). Another thing with emails, they hold a certain legal sense. Ad-hoc communication and a message to a slack channel can be "lost" or "claimed to not be seen" it is very hard to claim you did not see an email that was sent directly to you. Also, email acts as a a system of records better than Slack/Teams/Etc ever will in my opinion. Edit: Also this article was posted to HN recently and it captures another benefit of email being asynchronous vs synchronous. https://www.patkua.com/blog/email-is-async/ https://www.patkua.com/blog/email-is-async/