Probably benefits grow when you shift from simple emails to more complex ones. If you have to send quite a few emails per day and if you can do that quicker and/or better then there’s benefit in using the tools.

After all someone came up with an idea to do away something as simple as us writing ’BR, my name, my company’ in the end of the email - and pretty sure no one would give up that simple feature.

Might be a significant issue if more applications adopt these kind of festures and can’t share the resources in a meaningful way.

…which doesn’t really mean much as an argument.