I got my first computer with USB in 1999. I used it with a serial mouse, an AT keyboard, and an LPT printer (passed through a Zip100 on the same port, of course ;-) ). I think that my first use for USB came years later, when I'd already replaced that motherboard. I think I might've used a USB->PS/2 dongle at some point, but that was at the back of the computer, and I didn't care. Any memory card besides SD needs an extra adapter, and that stinks.
Over all these years, this is the first time that my primary machine is a mobile device (laptop), and that I might have to use dongles with the hardware that I'll be repeatedly connecting and disconnecting as I move around.
It's not a big deal, but it'll take time to transition from the last "single connector for everything" to the new one. The only problem I have is the rabid USB-C fans telling me I'm being left behind for sticking with my current hardware for a few more years.