You'd reduce manufacturing costs and mess generally yet avoid having to change plugs in the UK, Australia, NZ, Ireland, Malta, Cyprus etc.
The three pin plug used in Australia is also used in New Zealand, Papua New Guinea, Fiji, Samoa and other countries throughout the South Pacific (East Timor also has some Australian outlets due to the rebuilding work done in 1999-2007 during peacekeeping work). No point in changing in what is essentially a good socket pattern in this part of the world with the ability to plug a 10 amp plug into a 10, 15 or 20 amp outlet with no problems.
The volume of equipment sold is here in this part of the world with the AS/NZS 3112 pattern plugs easily would outweigh the inconvenience of changing to a "world pattern" plug.
To change to a "world pattern" plug brings to light another problem: what size do you make the new outlets? Most outlets here are on 115x73 mm plates with 84mm mounting centres, some are 115x115 mm in older installations. British outlets are different sizes for singles or doubles so which outlet plate size would be the accepted version?
