Old style fuse wire protection can be dangerous. Any existing older style fuse wire wedges are now very old – 40 plus years. They rely on a thin bit of wire to overhead and burn out. After decades of heating up and cooling down it can cause poor connections to cables, which in turn can cause the switchboard to catch fire. A new switchboard will provide a much better circuit protection and also individual earth leakage protection per circuit.
If you only have one old red circuit breaker protecting multiple circuits, you can potentially lose most of the power in your house.
Changing old porcelain fuse holders can be dangerous. They can be cracked and broken with a risk of electric shock. The wrong size fuse wire can cause electrical cables in the house to overheat and cause fires.
Upgrading your switchboard can also mean relocating the board and also upgrading the board and also upgrading the size of your mains cabling. Upgrading your switchboard also allows room for expansion for additional circuits.