Going from game port to USB with "plug and play" was a huge deal man. Not having to manually assign IRQ to get your audio working too lol. That said, there is still one thing that was cursed in the old days and remains cursed now: printers. Fuck printers.
I remember having to configure the sound card within games. IRQ and DMZ settings. I had no idea what I was doing so a lot of the time I just played without sound.
If you started a call with your cellphone close to a loudspeaker you could hear the connection being initiated through the speaker. Something like a tat-ara-tat sound.
Why are you surprised? The only ADCs in you computer were on the sound card, and a joystick was just two potentiometers and a couple of push button switches.
Reminds me of a story: I ordered a soundcard for an engineers workstation. Had problems with accounting about this. What does he need a Soundblaster for? Well, he actually needed a joystick for his CAD package!
The parallel port scanner that made your entire computer able to do absolutely nothing while scanning. No mouse input, no display update. An absolute time warp for your CPU.
I used to have to unplug the printer from the parallel port so I could plug in my first MP3 player and transfer MP3s I had totally legally acquired in 1999.