If I had to hazard a guess, it'd be that HTML email is probably one of the lowest priority things on the roadmap over at Google or Microsoft. The vast majority of regular folks sending emails send mostly plain text, and even many company sent emails also on the basic side (though with these limitations, it's probably self reinforcing there).
Add this how more complex emails could potentially lead to security issues for their webmail clients and waht not...
And well, "eh, good enough" is probably the order of the day.
Or 1 million people sold $1 worth of Apple. If you want to execute a large trade, you'd probably have to buy from several sellers, and (my limited understanding of the market is that) you'd do so by matching sell orders in ascending order, thus pushing the market value up.
Looking through the settings, I reckon one can set a message to be sent automatically to your "emergency contacts", along with your location when you use the mentioned feature. A possible use case: coming home late at night, you get followed by a sinister looking guy; you can discreetly ask for help without pulling your phone.
