We're only talking .5 or 1/2 points. It's much easier to give an 8.5 when stuck between 8 and 9. It just gives more options and accuracy IMHO.
It does look like we will be using the 10 point 1/2 decimal system.
Example 3.5, 4. 4.5 ......8, 8.5,9, 9.5, 10.
Based on
1) appearance:
2)...