Just like everything, there are positives and negatives to each of the above mentioned concepts. It's depends on what you're looking for in a project.

Taking about open blockchain, in our opinion, it doesn't really matter who is the founder of a particular protocol as long as it is distributed enough to function on its own. Take the case of bitcoin; setting aside the constant search for Satoshi, it's clear that even if he IS found, it won't necessarily affect the protocol, as bitcoin has gained enough traction to function on its own.

It's only applicable to some projects ofcourse. Not all are susceptible to being independent from their founder.