>Is it a good idea for me to buy Yubikeys or Titan keys for my personal Google account? My wife's? My childrens'? Will that make it less likely, or more likely,

>Is it a good idea for me to buy Yubikeys or Titan keys for my personal Google account? My wife's? My childrens'? Will that make it less likely, or more likely, that I eventually get arbitrarily locked out? Yes. Buy the keys with at least one backup key. Treat the backup key(s) as 'critical data' and keep it in a fireproof safe or a safe deposit box. As you add more 2FA to existing accounts, you will need to periodically access this backup key and attach it to those accounts. It's extremely unlikely to be locked-out of your account if you authenticate with U2F key and password.