It is very high risk. The work is immense and the reach is almost non existent. 

This is why we didn't demand that people install pkdns to use Pubky, in fact we are doing a lot of work to allow web apps as easily as possible. 

You gotta go to people where they are, I am even worried about asking users to install a key management app, and that is why there is always the option to upload your keypairs to a web app on your own risk, just to lower the barrier to test the system and what it has to offer.