I just bought a new PC, based on Lenovo Legion gaming desktop.
It comes with
2 USB port in the front, 4 regular USB port in the back + 1 USB-C port. That's a total of 7 USB slots.
It's been like 2 decades that every possible hardware device comes with an USB interface. Keyboard, mouse, joystick, hard-drive, memory stick, headset, webcam, spot/photo camera, and many others.
Of course it's my fault, I should have thought about USB connectors when shopping for a new PC and check before buying. but seriously, 7 USB slots is so few compared to all the device I have using USB
I don't know if this is a gaming PC or high end etc, but for me 7 USB slots is a lot. I usually need 2, in most extreme situations I would need 4 I think. So maybe the PC is just designed for an average person who is not too tech savvy? I have to think really hard about what I would do with 7 slots.
Audio interface is great to plug the guitar to the PC, and is used when I put sound the speaker. Headset (which is actually a wireless USB, It would make sense to update to Bluetooth) is used when doing voice call/chat(A decade back, I was living abroad, and playing TTRPG through voice chat, got the habit to use a wireless USB headset at this time, but indeed, it's something I could rationalize considering that I don't use it much anymore)