I recently learned of LastPass Authenticator and I read up on it and other similar 2FA apps (especially Authy). Initially, I thought I should use one of these 2FA apps, but I just realized, because I only use "trusted" PCs, I probably would not use the 2FA app. Wherever (LastPass, Hotmail, G-Mail) I would use a 2FA app, I use a PC that has already been designated as "trusted" on these sites. I don't think the 2FA app would ever get used. Am I missing anything?