Then why tie the format to present-day technical tools like text editors? Why not invest in a format that makes sense and the tools to understand and work with it?

Also, GPUs and their architecture aren't a fad, they have been the same for the last 30 years. If you want your format to be truly device agnostic, text is a bad format because it precludes many types of devices (GPUs and hardware accelerators) from being able to use it.