LastPass is already dead https://www.wired.com/story/lastpass-breach-vaults-password-...
It is the market leader, multiple times larger than the runner up. [1]
(But this is HN.... Facts shouldn't get in the way of a good story!)
[1] https://www.statista.com/statistics/1331322/password-managem...
I don't expect them to lose much ground though. Something like a password manager will have some very strong lock in inertia, but it's telling that people actually take the effort to move away from it.