I'm pretty sure I didn't retire the last of my ps/2, serial, and parallel port equipment until about 2010. Gameport and AT probably went out around '05-'07—until then USB saw very little use and if I'd had to pick all-USB or no-USB, I'd have chosen the latter. My ~3-4yr old unremarkable desktop motherboard still has several legacy ports. I've made no special effort to resist USB, I just haven't retired equipment if it's still useful.

USB came out it 1996. Peripherals stick around a long time.

A bit misleading. Apple was the first major manufacturer to adopt USB in 1998. It took a good 5 years before PC's started adopting them. The move to USB-C is happening much faster.

http://www.tomsguide.com/us/why-your-next-phone-or-laptop-sh...

You'll soon need adapters to use those peripherals for laptops and Surface type devices.

The day when I don't have to squint to tell the difference between the various flavours of Micro/Mini USB cannot come too soon.

Serial and parallel devices died off pretty quickly though the ports lived on for various reasons. PS/2 keyboard and mice endured a good while longer.

I've only seen the joystick port appear on sound cards, which themselves are pretty much dead, and the AT connector was all but extinct by the mid 1990s.

New motherboards seem to fall into two camps: Legacy ports of all flavours, or ridiculous numbers of USB 3.0 ports. I saw one recently with 12 USB3.0 connectors on the back.

Doesn't mean those people were wrong at the time. I was still using a serial port until 2012, still using a PS/2 keyboard until 2014. So I was right not to buy a USB-only PC in 2010, even though I've now switched to one.