| It is used just as much as it ever was, just not by average home users.
Very true - it's still very common across many different industries.
Car-mounted GPS units, management/configuration ports on cisco routers/switches/etc, UPS devices, packet-radio modems, smart-card readers, temperature sensors, electronic access controllers for doors and gates, etc.
There's countless serial devices still in active use and still being actively manufactured, and we have many dozens of them in everyday use across our office campus
It's been annoyingly hard to find new laptops that still have serial ports on-board. Major downside of the USB-to-serial devices is that they tend to automagically assign a new comport number each time they're plugged into a different USB port, which is annoying because if you have your software configured to talk to a GPS receiver on COM3 you don't want to to keep jumping to COM4, COM5, COM12, COM-whatever.
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