As it is now RealWorld requires that Digital Age DLC is installed and turned On. Subsidiary DLC and City Economic Simulation DLC are both optional.
I don't know if Piermario will make a Realworld that does not require Digital Age DLC. (and maybe name it RealManufacturing

)
Most of the products are unrelated to the DLC, so there will still be a lot of extra products.
But I guess it requires a lot of work removing all the products, features etc. that require the DLC.