The whole business of the company I work for, and of the large network of peers around the world, is built around a piece of AGPL licensed software called OpenERP[1].
Just to poke a little fun at you, Most ERP softwares are not well-known for being exactly understandable by average developer, and is known to be consultant-based business so much that it is hardly possible to learn it without paying for consultant.
It's just another way of being proprietary by obscurity.
The whole business of the company I work for, and of the large network of peers around the world, is built around a piece of AGPL licensed software called OpenERP[1].
In other words, my paycheck disagrees with you :)
[1] https://www.openerp.com/