There is a separate topic about suggesting new features for the scripting language: http://forum.mikrotik.com/t/built-in-function-library/117288/113
Maybe this fits better in there…
However, it was started in 2018 by mrz but it does not look like any of the useful suggestions made in there has ever been implemented…
One problem with the scripting language is the fixed 4096 byte limit on string values, even within expressions, which means that a file larger than 4K cannot be processed this way. It would have to be processed in a “open/read records in a loop/close” fashion, but the scripting language does not support that.