_ wrote:

Some demo versions of CNC software have a line limit - how limiting is it?

Depends entirely on what you want to do.

Hand coded G code using the arc commands and whatnot can do a lot in
1000 lines. G code produced via CAD/CAM tends to have a lot of little
segment moves for arcs and will eat up 1000 lines rather quickly. Most
any G code can be broken down into blocks of 1000 lines and run
separately if the hassle factor is less of a factor than the modest cost
of the licensed version of the software.