@Krysztof I have been testing out Radicle, which looks like it would be a strong contender for distribution, and would allow for updates and changes to be tracked (it is essentially p2p Github). Though obviously being able to send the entire core of the program p2p over an email attachment or something similar would be the most ideal.
I know we've talked about Atacama privately before, and how the person behind it is dedicated to keeping it down to 8mb. Would be nice if we had a goal like that for how big the core application should be.