My maker ,cheap one, just don't seem to be hot enough.
The more expensive makers allow you to set the brew temperature. I have had good luck with those (I always set them to maximum temperature). My guess is that if the coffee maker is high-end enough to allow you to set the temperature in the first place, that it's high-end enough to actually monitor its temperature. The cheaper makers are just hit or miss. They just throw the cheapest (Chinese) components in there when building the thing, and the temperature that comes out is the temperature you get. I have had cheapies that made boiling hot coffee, and cheapies that made lukewarm.
I use an insulated mug (Thermos brand) and my coffee stays nice and hot for hours if need be. This Thermos mug was one of those Costco things, where you have to buy two of them. After many years it still works great, and doesn't leak a single drop if you close it off and throw it into your bag.
My wife was given one of those fancy Yeti insulated mugs for a work Christmas present. The cheap Costco Thermos mug blows it away. Absolutely smokes it in heat retention for your coffee. This Yeti, at probably five times the price, is a total joke. It
looks high-end, but it sure doesn't perform like it. And it leaks. And the top pops off easily. And the company is anti-firearm. And the Yeti brand is ridiculously expensive. You couldn't design a worse way to waste your money if you tried. A friend of mine has one of their coolers. A multi-hundred dollar thing. It does perform a little better than my Coleman and Igloo coolers. A
little better. It certainly is not massively better. At the end of our four day camping trip last year, both my Igloo and his Yeti had ice left in them. Not a lot, mostly melted, in both coolers. But good enough for me - we just had beer in there for outside convenience - the real food was kept in the refrigerator in the 5th-wheel trailer. Now
that's camping! Refrigerator/freezer, indoor toilet, shower, recliner, couch, tables, king size beds, microwave, stove/oven, hot water, big screen TV, stereo system, A/C, Keurig, generator. Camping at it's finest! No dishwasher in there though, so we had to rough it through that part.