It seems that running a free CA doesn't really have a business model, so capitalism isn't going to produce viable competitors. Additionally, other impact-focus

It seems that running a free CA doesn't really have a business model, so capitalism isn't going to produce viable competitors. Additionally, other impact-focused people (non-profits, etc.), who would otherwise be willing to make a free CA, probably think Let's Encrypt is doing good enough, so why waste valuable time making the same thing when you could focus on having an impact elsewhere? I suspect this is a pretty common end result in public-good tasks that don't have business models. They naturally grow to be too big to fail. Some governments try to solve this by just absorbing the task and making it a part of the government's responsibilities. I doubt this would happen for Let's Encrypt, so I guess we'll be stuck with a too-big-to-fail non-profit until it fails, starts to suck too much, gets absorbed by the government, or someone figures out a business model.