[UebVar]

I disagree. The plug is usually part of an appliance connector cable, that has no idea what happens to be on the other side aswell. If you size that cable for the same current as the socket, the cable itself is protected by the circuit breaker.

The correct spot for the fuse is the appliance itself. Fuses used to be easily replaceable, often with fuse holders [1]. I have, however, never seen a computer with one.

[1] https://uk.farnell.com/productimages/large/en_US/4578676.jpg

[LiamPowell]

There's simply never a reason for a user to replace a fuse in a properly designed device. If a fuse blows then it means something has gone horribly wrong and replacing the fuse won't fix it.

The exception would be a device that sends mains more-or-less directly to a user device, then a fuse would be protecting against a fault in the user device and should be replaceable. A lamp that takes a regular light bulb would be a good example of this.

[regularfry]

Replacing the fuse alone won't fix it. But it at least gives you a chance to be able to fix whatever the underlying cause actually was.

[pezezin]

Most computer PSUs have a fuse inside, and it is quite easy to replace them.

I know because many moons ago I blew one, in the era when PSUs had a toggle between 120V and 230V, and I set it to 120V in a country that runs at 230V...