Fair enough, but I believe there is a spectrum between "I don't want to know things, let them just work" and "self-host and manage an application for storing the most sensitive type of information".

1Password is neither opensource nor self-hostable, and it stores data in the proprietary cloud (at least exports are easy). But I understand that and accept it.

If I get a Macbook, an Android phone, and a Windows PC (a very popular combination of devices, btw), I honestly don't have energy to investigate how to inter-operate their passkey solutions. From the get go, I assume it's gonna be either impossible, or very hacky and fragile. Maybe I'm wrong, but last time I checked I simply walked away thinking "nope, no passkeys for me".