Don't let perfect be the enemy of good. Have you seen how people manage their passwords? Even a deeply flawed password manager is better than the current method

Don't let perfect be the enemy of good. Have you seen how people manage their passwords? Even a deeply flawed password manager is better than the current method of using the same password for everything or resetting their password every time they need to log in. Average people probably have 20-50 accounts they have to remember the passwords for regularly, and for people who do a lot of online shopping or internet browsing, it's probably closer to 50-100. Even when we had to remember phone numbers, people retained what, like maybe 10, max? Expecting them to remember unique combinations of 50 different username/email/password combos isn't just bad security, its arguably near impossible for most people. It's all well and good to warn about the flaws in trusting a browser (although this basically amounts to "too much is going on so don't trust it" which is a poor argument) or the inherent insecurity of a master password. But if you're already in the state that most users are in, those "massive issues" are orders of magnitude better than the current state. The convenience compromises those solutions make is so that people will adopt them. Is this more secure? Definitely. Will any significant number use it? No.