I feel like convenience is an important part of making security keys work effectively. These are definitely cheaper, but once you move out of the large bully USB-A keys to those that might not require adapters, might be smaller, more useful with things like NFC, they get a lot more expensive. Still cheaper than Yubikeys, but similar ballpark. I’m not sure this would change the maths on whether to use a security key or not for that many people?