I love these sorts of little projects. I don't know else who is likely to use something like this other than a really serious podcaster or vlogger, but clearly the writer has a need for it. It's also a great reminder of the versatility of the cheap microcontrollers we are able to use these days. It's pretty straightforward to use one to make just about any kind of input device you might want, and with wireless microcontrollers like the ESP32, you can even give it wifi! I use a variety of ESPs around the house with ESPhome for home assistant, doing all sorts of things. It's pretty easy to get into (home use level, not production electronics) embedded just by reading some datasheets and writing a little code these days.