I think the design choice for the port is quite funny. With Apple, you’re used to seeing aesthetically pleasing designs, and this thing charging looks ridiculous. However, on the one occasion I missed the battery level, I only had to have it plugged in for about 15 minutes to get quite a few hours worth of use out of it, and then I just charged it over night fully.
I have the battery widget in the corner of my screen so I can keep an eye on just that, along with my keyboard, so if I can see it’s getting low I can prepare for that. But even in my older iMac I used to have the Bluetooth icon in the Menubar so I could just click to battery levels: is this something that people just don’t do now? I do wish you’d get a notification like you do in iOS/WatchOS, but keeping tabs yourself is kinda’ what you have to do with battery devices isn’t it?