If we didn't already have the perfect option that is bitwarden I would probably go for this. But there's really no reason to switch away from bitwarden to this. It's open source, gets regularly publicly audited, and nothing ever leaves your device unencrypted. So even if they had their data center broken into and all machines stolen physically I wouldn't have to worry about my passwords
Does the creative commons licence at the end of every comment really do anything? Are you going to do anything about it if someone doesn't respect the permissions you've laid out?
To add onto what Andromxda said, SimpleLogin is included with your Proton account (might be paid accounts only).
Use it with a custom domain - it's amazing and if Proton Mail ever shuts down you won't have to migrate any of your logins because they're already on your own domain.
SimpleLogin has a free tier, which is limited to 15 aliases. But if you have a paid Proton subscription, you can connect your SimpleLogin account and you get the premium version.