It’s a saturated market and email is starting to disappear (it’ll take years, but the signs are there).
They’d be better using it on the browser and ditching other products.

please explain what keeps these men in the relationship that they can’t leave.

Have you ever been in a relationship? Any relationship? Doesn’t look like it.

Calling “missing bolts” on a aircraft an “ordinary failure” is the understatement of the year.