Is there a limit to how big a plotscript can be?

No.

DOS versions used to have a low limit that people sometimes ran into. Until Hróðvitnir, the limit used to 256 kilobytes when compiled, which would be a script tens of thousands of lines long, a limit almost impossible to reach except for scripts generated by computer program.

Also, a script can use at most 100 local variables.

See Also

• What are the limits on various things?