It used to be one size fits all but today’s power points come with a wide variety of requirements being placed on them. So there is a wide variety of plug types.
Caravan plugs are of a special design and configuration.
Outdoor plugs for spa pools and BBQs need to be correctly rated and protected from the wet.
Plugs with RCD protection built into them are needed in places like bathrooms if there is no RCD protection in the switchboard.