UFCS and overloading

[Szymon Gatner via Digitalmars-d-learn]

On Tuesday, 7 April 2015 at 14:46:52 UTC, cym13 wrote:
> EDIT: mis-formatted previous snippet
>
> import std.algorithm, std.stdio, std.range, std.conv;
> void main()
> {
>     stdin
>         .byLine
>         .filter!(s => !s.empty && s.front != '#’) // Filter 
> with this lambda function
>         .map!(s => s.to!double) // Map the strings to doubles
>         .array // Sorting needs random access
>         .sort!((a, b) => a < b) // Another lambda
>         .take(10) // Applyable to any range
>         .writeln;
> }

Yup, I get that, still does not explain why UFCS can't extend 
overload set. Especially if there would be no conflict wrt to 
overload of method vs free function.