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130F is (was) the typical serving/holding temperature, rather than brewing. This has climbed substantially over the years since I last looked. It now seems to be 150-175, and the cynic in me suspects this is for the same reason that McDonald's did it (albeit higher) in 1992.
However, it can also be explained by changing consumer tastes. Back then, coffee was coffee. It was often consumed black, or with just a splash of (often room temperature) cream. With the rise of Starbucks and the like, coffee is now frequently used as an ingredient in coffee-flavored milkshakes. If these are to be served hot, either the starting coffee needs to be hotter or it needs to be heated after.
As for needing to keep it warm on a hot plate, all commercial coffee makers I've ever seen (plus every single home drip machine, which were based on the above) have at least 1 hot plate, sometimes called a heating pad. In fact, the model I see most often has 2- one on the bottom while brewing, and 1 on top for the existing pot. Your home models usually don't have an option to set the temperature, but commercial models do. Or at least they have a setting that's been designed for its use in restaurants.
Side note: Try making cold brew sometime. It's a very different experience, but one that actually works better with cheap coffee.
I replied to another user below but the same reply would apply to this message aswell. I'm not looking for an argument but I just struggle to understand what the desired outcome here would be.
I apologize if it came across as argumentative. Serving coffee that's too hot to drink saves money on refills, since the customer has to wait for it to cool.
As for an ideal world, it's worth keeping in mind that McDonald's (etc) very rarely brews the pot just for you. It's usually been sitting there for a while. Simply adjusting the hot plate temperature resolves it. It's also something that other places have solved. While I don't frequent Starbucks, I hear they have "kids temperature", which is served around 130F. I presume this is another pot kept at a lower temperature, but it could just be ice. But even above that, you don't need skin grafts when you burn yourself on 150F coffee.