We watched a show where there was a concept called a Dead man's switch, and my wife asked me if I would ever do something similar, but include all my passwords, for everything.
I would understand self hosting but those are for-profit entities as well. They might be subject to less regulatory oversight because they're smaller. They might not have as many resources to keep my data safe. They have benefits for sure but trust is not this easy to judge.
The difference is their business model is privacy. Google's business model is advertising. I'm Proton's customer, but advertisers are Google's customers.
