Less than 1000 if you can live with 32 bits but I wonder if someone goes for that option nowadays.
> and that is for a single OS, a single CPU architecture.
The MacOS version supports both Apple Silicon and Intel.
Also, you are not allowed to give a saved image away / cannot run it without the licensed LispWorks installation.
I think you're not talking now about the HobbyistDV version mentioned in the parent comment, are you?
Right. I don't count the 32 Bit versions as serious contenders.
> The MacOS version supports both Apple Silicon and Intel.
That is good news. For pure Mac users this is interesting, still very expensive. Personally, my development time is split between MacOS and Linux.
> You are limited to run your programs inside the development environment, this limits its applicability a lot. You can't write a simple command line utility this way, just to name one example.
You can save and run a console-only image which doesn't start the graphical IDE.