[jcormont]

Sure this is a major restriction but there are lots of systems out there with architectures that never changed. I think accepting major changes from framework authors is something we learnt over time, from projects with lots of people who have lots of ideas and the project ends up swinging in all directions.

[pknopf]

Just remember, coming out with a V2 that has no upgrade path, while still supporting and improving V1 and V2 doesn't count. ;)