[squeaky-clean]

Yes and slack is not the first instant messaging program. /snarky quip about your age and IRC/

How many corporations use G suite for their email? How many roll their own email systems and use thunderbird?

To the average user, email is a proprietary non-federated system filled with tracking.

[w8rbt]

Sorry, I don't mean that as snark. Many people born after 2000 have known nothing but Gmail as email and are surprised to learn that other email systems/providers exist.

[bdcravens]

That's nothing unique to age. I regularly talk to people born before 1960 (and 1970, and 1980....) who don't know that email is separate from it being on a website (about the only difference is that they know of Yahoo Mail, Hotmail, etc)