forward rendering will enable you to use MSAA if you want sharper looking images, in general terms forward rendering was the only type of rendering technique pre-defered used back then even in its lower spec form. It also allows lights and materials to act a little differently. But at all costs IMO TAA should be avoided f you want to help fake that old look for the obvious reason that it blurs the edges and makes things look too smooth and washed out.
Ok, thanks again. I also downloaded the old DOS Autodesk 3D Studio from 1990-1993 so I can test render my scenes with an old fashioned renderer (for reference). Surprisingly, .3ds files from 2019 still work in the old 90s software.