Because Tcl/Tk's advantages, We really apriciate Expeditionpcb Automation support Tck/Tk.
Add Python to that (to prefered languages)
We used to because at that time we just moved over from UNIX and this was the scripting language we knew best.
When we figured out the difference between internal and external COM-clients we moved over to VBScript because it gave a speedup of factor 10.
Right now, we think we have about reached the limit of what we can do with VBScript and are in the process of moving over to .NET.
For the layout part the transition went rather smoothly but unfortunately we haven't managed to get the .NET-CES combination to work at all.
Lots of Greetings!