Comment by ChrisLomont

Because that syntax in raku uses rational type, which fails for many other uses, and by using the syntax most languages use for a floating type, makes it harder to spot these issues, just like here. For example,

    0.1e0 + 0.2e0 

yields 0.30000000000000004. Your example also fails

    1.1e0 + 2.2e0 == 3.3e0

returns false.