You'd have this mug in your collection. Yes or no?
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it doesn't drool!
you smell its breath! You don't know the half of it!
...oxidizing the flavenoids, and the higher the temperature the quicker that happens.
In the thermomug, there's no added energy so those reactions actually slow down.
The complex alcohols & aldehydes oxidize to carboxylic acids which create sourness & a less pleasant bitterness.
See what happens when you get an organic chemist started? 
But, one works with what one has. I don't really make it much hotter, just a bit. (Plus, the main reason is to keep it hotter longer.)
I'm rebellious by nature.
I put the image in my signature line because mostly everyone else hated it.
I'll keep it there for a little while.
Hard no for me—and this is coming from a woman whose favourite mug (I actually have two!) is covered in skulls…
Just sunken eye holes.
My son actually found the pair of them sitting on someone’s trash bin—price tags on ($24 each!)—in a Mennonite neighbourhood, of all places. Nice stainless steel mugs on the inside. For some reason, he’s been unwilling to use them so I got them by default—one for work and one for home. 
He'd kill me.