lol I ran a sizeable team around 2020 and I had to educate a couple of our new hires straight from college that they actually needed to check their work email, after they missed important HR related stuff and they had just completely not realized it was an avenue for company communication, with an assumption that everything was available on our heavily used slack.
If email was a commercial product, the company would have done something about that. Email died because it was an open platform, with nobody to address this systematic issue.