Are there any fundamental issues, or perhaps some dislike for ERM? Is there anything about it that's unsatisfactory?
Why the desire to use a custom language? Fans will have a hard time; someone on the forum was lamenting that they spent 3 months learning ERM, and now there's a new language.
Or is it related to the fact that zvs is supposedly discontinuing support for Wog and ERM after the release of version 3.59?