Procedures would be kinda useless

[Botffy]

Assignment of arrays in PLanG is by value, that is, they are recursively cloned during assignments. Passing an array as an argument to a function or procedure would follow the same behaviour.

The problem is, this makes procedures kinda useless. Traditionally, in Pascal, procedures are used to alter passed arrays, and that'd be a good usecase for Plang too. But that's impossible with these pass-by-value semantics, unless we introduce out parameters. Without it, the only possible usecase for procedures is to output things. Which is underwhelming.