On 19 Apr 2007, at 08:25 , Christopher Lozinski wrote:

The problem with upgrading ZClasses is that it would break the zope security models, and the Zope Product Model.

That depends on what you by "upgrading ZClasses". To make them continue to work, simpler changes will probably suffice. It seems, though, that you want to create this next generation of ZClasses that has a simpler security model, form generation built-in etc. So that would be a rewrite as you've already mentioned. But I don't think it's worth all that work. Writing filessytem code can be just as agile. That's of course just one man's opinion.