As per my understanding, data if stored out of EVM is cheap, because the cost of writing data to EVM is a lot. And it also frees some space from EVM when data is stored somewhere else. So, its good.

Therefore, I don’t understand this what your written well. Yes, increase call data cost makes sense according to demand, it would affect only chains that are using Ethereum to store data, or have written data into EVM, only done computational work on validating transactions elsewhere.

It will be good to slightly discourage other Ethereum compatible virtual machines from writing and storing data on EVM. This is possible, with zk roolups, Ethereum verify proofs while data is written and stored off chain, and call e called back with some function command.

Very light data will be stored on EVM, which makes the dapps cheap.
Anyway.