Also processor licenses, library costs for devs, etc. I recently stumbled over a Java domain specific development system (for insurance), where the dev seat did

Also processor licenses, library costs for devs, etc. I recently stumbled over a Java domain specific development system (for insurance), where the dev seat did cost 100k euros. Franz and LispWorks has different licensing models for companies. Franz is going the route of per usage/value and LispWorks has no extra cost for delivery (without the dev environment). These licensing models are specific for tools in small niches. You'll see similar models for example for commercial Smalltalk systems.