1Password suddenly offering to save passkeys without mentioning that they can't be exported to other apps (but are seamlessly synced between devices using 1Password) is what lost them "good guys" status in my mind.

It immediately creates a huge lock-in in a hard-to-notice way. Luckily, I did noticed early on and manually removed the 20 or so passkeys I had created.

Earlier this year, I lost my iPhone and restored from backup. I was shocked to see that I could log into my 1Password account using only the master-key, and that the secret-key was not required. 1Password clearly stated that the secret-key was required to setup a new device, but it turns out that they also (perhaps recently) configure it to upload to all devices in your iCloud account[1]. Ever since then, I've lost faith in 1Password's ability to communicate their security model to me and started looking for an off-ramp.

[1] https://support.1password.com/secret-key-security/