I mean email is universal.
Corporate email services, exchange server etc are enormous and integrated into the workflow of hundreds of thousands of the world's largest companies.
> Because IMHO replacing it would mean to understand what people actually use it for these days
You can't replace something so deeply embedded and universally used. You extend it.
I'm still more interested in the use case. Not what it takes to replace email. Because IMHO replacing it would mean to understand what people actually use it for these days.