>when the Team has improved SET DEFAULT TO, it had to add SET("default", 1|2).

I guess it wasn't on there priority list. :)

>FULLPATH("") is not a good choice, why it is the much slowest one,
>and sure it is not readable.

The speed woild be only issue if you call it in the loop, do you? And it's much more readable than SYS(5) + SYS(2003) or whatever.