I use my ember mug because sometimes that first sip of coffee in the morning triggers something... urgent.

It's nice to come back and still have my coffee at the temperature I left it. I also like that it keeps the coffee warm without overheating and burning it, like a hot plate would.

IDK about later models, but mine has no screen and I control it with open source software.

I usually drink my coffee while I'm doing other things like video games or browsing Lemmy or cooking breakfast etc so it usually takes me a bit to get through a cup since ei often forget it's there. Nice to not have to pop it into the microwave every time.

They're largely pointless with the prevalence of vacuum insulated mugs. Not really sure why anybody would want to add batteries and chargers to a hot drink scenario, but I also generally finish my coffee before it's cold from a regular ceramic mug.