JR4 still the best. Why you abondoned this?!
Using Jamroom
Sales. Nobody was buying JR4 but it still took time keep it running.
JR4's focus was to offer a complete "sell music online" package for anyone who wanted to run that type of website. But the number of people wanting to do that got less and less.
JR5 and JR6 focus more on the underlying architecture to be flexible so you can adjust it to fit your needs. The problem was it was still very difficult for non-technical users to understand, so we added many tools to allow non-coders to adjust the system.
Probably the future is custom projects built on jamroom for individual clients who want specialized systems set up instead of releasing more general stuff. So if you want something unique built, contact the team, we can build it for you.
JR6 core is incredibly flexible its built
* genealogy software
* community management systems
* multi-business management platforms
* mobile back-end servers
So i guess you're right when you say JR4 was better as a "sell music online" system, but JR6 is great as a platform for building multi-user systems.