- Would it be an 10x improvement over current implementation of stack overflow?
To read and write to the blockchain, you need a decentralized network to support it, it is nothing as a static datastructure. To reduce blockchain to "a datastructure for money" doesn't cover how it works.
If your answer is anonymity or freedom from regulations, governments don’t care. They’ll regulate you.
because there is a whole ecosystem developed to support it, and people using. You don't need to setup a backend, payment system, integration and most important, will not be the middleman.
but to be honest I'd rather see git with crypto than a forum with crypto. get rewarded for your code. maybe only for running API versions of it.