How would you convince people to use a different system of standered units?

Answer 1

You could start by using standard spelling!

Convince them of the advantages of adopting the different system. Possible selling points:

• widely used elsewhere,
• simple to use,
• easy to convert across range of magnitudes (for example by using perfices),
• simple links across units for different measures.

Convince them of disadvantages of not adopting.

• Being left behind by the rest of the world,
• Being viewed as intellectual troglodytes,
• Having to adopt the new system anyway for international dealings such as trade, and so having to run two systems in parallel.