Number of Arguments in R Scalar Function

Vertica 7.0 Programmer's Guide has the following note:

Note: : Transform functions written in R can have an unlimited number of arguments. Scalar functions written in R are limited to a maximum number of 32 arguments.

Is there still a limit of 32 arguments (columns) to a Scalar function? If so, could someone explain why is it so? Is there a way to pass more than 32 columns to a R Scalar function?

Thank you.

Ravi