The bandwidth problems of the Ethereum network have indeed caused some projects to fail to grow and scale. Therefore, everything must develop and grow at the same time.
I do not see any problems switching to another blockchain, now there is a large selection of different blockchains with better characteristics and more suitable for projects that require high transaction speed and low cost.
STONE framework should combine several protocols, so I also think that problems should not arise. But now it's too early to talk about it, I have not yet seen the finished product.
I agree with you, I would also like to receive more information about this project in order to assess its potential and prospects for the cryptocurrency industry.