I agree with you, such projects are really very interesting and I also support the development of this project as I want to see a finished workable product.
I think first you need to get more information about the plans of the developer of this framework in order to assess the perspective. I would also like to hear the opinion of game developers about this framework.
The decentralized gaming industry is growing at a very fast pace and needs all sorts of frameworks, add-ons, enhancements, and more. I don't know what STONE will look like, but the idea is great.