lambda.r

Requires learning non-standard operators like %as% and %::%, which can be a barrier for developers accustomed to base R and increase initial setup time.

Standard debug() doesn't work; must use debug.lr and undebug.lr, adding steps and complexity to the debugging process, as noted in the README.

Pattern matching and type checking introduce abstraction layers that may slow down execution, making it less ideal for performance-sensitive applications.

Extensive use ties code to lambda.r, reducing portability and interoperability with packages expecting traditional R function definitions.