In the past the model for software would typically be to ship a fixed application and then if users need some custom functionality, they would need to install a plugin or create their own.For non technical users they would have to find an existing plugin or maybe it doesn t exist so they are stuck.But I can t help but think what why wouldn t for example an application just have a prompt box that builds an extension dynamically on the fly.Obviously it would be use at your own risk and YMMVHave any companies or applications actually done something like this?I think modifying the real source code would get out of hand but perhaps just generating extensions that have access to a sand boxed set of safer APIs.