Everybody who wants to have a zone of invention will want to create faster and with the best tools they have. They are not inventors anymore, no inventor would repeat primitive things instead of learning new wonderful knowledge and advancing the state of the art. This may create some ethical problems, though such problems have never been too serious and I do not see any reason to believe they would be more serious in the future. I personally would much rather concentrate on the issues facing those who do want to move ahead, and let the neo-Amish curb their opportunities for inventions by themselves. People may have been relatively equal in very primitive cultures.
Modern humans are all different.
They do not have equal personalities, abilities, possessions, interests, rights of access to various things, etc. The diversity among people grows with every new opportunity and technology. Knowledge clusters will be more fluid and intermixed than anything we know, and the concept of equality would look to them as a memetic relic. I do not think they will retain much from today's DNA or machines, just as today's life forms and technologies have little in common with original autocatalytic chemical sets or clay tablets. As it is a good practice in system development, material structures should be modular, and easily reconfigurable.